Unit 4课时达标训练十二

Unit 4课时达标训练(十二)

Ⅰ.单项填空

1．We put a piece of cloth across the window to ________ the sunlight.

A．block up B．block out

C．break out D．break up

2．She was always ________ with the children in the kindergarten, never hitting nor scolding them.

A．careful B．calm

C．strict D．gentle

3．After fighting with his illness many years, the patient ________ finally.

A．pulled out B．pulled through

C．pulled in D．pulled off

4．Nobody knew when the fire ________，but they knew it ________ the next morning.

A．broke out; was put out

B．was broken out; was put out

C．broke out; put out

D．was broken out; went out

5．All the visitors were told to ________ for those dangerous animals while visiting the zoo.

A．watch out B．take care

C．watch over D．be careful

6．—What do you think of French?

—In my opinion, French is ________ English.

A．a subject so difficult as

B．as difficult a subject as

C．as a subject difficult as

D．difficult as a subject as

7．(陕西高考) The new station being built for the next Asian Games will be ________ the present one.

A．as three times big as B．three times as big as

C．as big as three times D．as big three times as

8．We should try our best to ________ those people after the disaster.

A．break out B．cheer on

C．break up D．cheer up

9．The motorcycle ran so fast that it crashed ________ the fence.

A．with B．to

C．onto D．into

10．________ you wouldn't like to go there, you can stay where you are.

A．Although B．While

C．As if D．Now that

Ⅱ.阅读理解

A

Copernicus (哥白尼) was born in Torun, Poland, on February 19, 1473. Little is known about his early life except that his father died when he was 10. An uncle adopted him, his two sisters, and his brother. The uncle saw to it that the two boys received a good education. Copernicus went to the University of Cracow. There he studied such subjects as Latin, mathematics, and astronomy. It was probably at that time that he changed his Polish name, Niklas Koppernigk, to the Latin form

of Nicolaus Copernicus. In 1496 Copernicus went to Italy, where he spent the next 10 years studying at various universities.

In Copernicus' time people still believed that all things — the sun, the stars, and the planets — moved around the earth. It was an old belief that few men had ever questioned. Aristotle had based his theory of astronomy on this belief. Because the Church had long been the center of learning, the theory was also linked to religious beliefs.

In 1506 Copernicus returned to his homeland. A few years later he began to work for the Church. All those years Copernicus carried on his work in astronomy. He had just the most basic equipment and, like other scientists of his day, made observations with only his eyes. Still, using mathematics and logic (逻辑), Copernicus worked out a different theory, which held that the planets went around the sun.

Copernicus did not announce his ideas. He did not want to make trouble. But he could not hide the scientific truth. So he talked about his theory with his friends, who strongly advised him to have his work published. His great book, On the Re v olutions of the Hea v enly Bodies, appeared at the very end of his life. Copernicus saw the first copy on the day he died, May 24, 1543.

1．Which of the following is TRUE about Copernicus?

A．He had two brothers and a sister.

B．He used to be called Niklas Koppernigk.

C．He lost his father soon after he was born.

D．He spent 10 years at the University of Cracow.

2．From the passage we can see that “astronomy” is ________.

A．the life experience of great men

B．the movement of the stars and the planets

C．the scientific study of natural objects in space

D．the theories developed by scientists of old times

3．Copernicus developed his theory ________.

A．using various telescopes

B．based on Aristotle's beliefs

C．through observations and reasoning (推理)

D．under the encouragement of his friends

4．The writer of the passage tells us that ________.

A．Copernicus did not tell about his discovery until the day of his death

B．for many years Copernicus dared to do nothing openly against the Church

C．pushed by his friends Copernicus decided to write a book in May 1543

D．Shortly before he got back to Poland Copernicus started to work for the Church

5．Copernicus had his great book published because ________.

A．he didn't agree with Aristotle

B．he could not hide the scientific truth

C．he worked for the Church

D．his friends advised him to do so

B

Last month, scientists enjoyed their first good look at Mercury in more than 30 years.

On January 14, NASA's MESSENGER spacecraft flew by the planet.Along the way, it collected a variety of data, including more than 1,200 high-quality images.As analyses get under way, surprises are already piling up.Observations include tons of craters, huge cliffs, evidence of volcanoes, and a strange, spider-shaped formation.The new images show that Mercury is different from the other rocky objects in our inner solar system — Venus, Earth, Mars, and the moon.

One of MESSENGER's most interesting discoveries so far is a strange formation called the Spider.Unlike a real spider, which has only eight legs, this one has more than 50 leglike trenches that stretch out in all directions from a large, relatively dark central area that surrounds a crater that is 40 kilometers (25 miles) wide.The entire structure lies within another huge crater called the Caloris basin.

“The Spider feature is unlike anything we've seen anywhere in the solar system，”Solomon says.There may, however, be similar features on Venus, Chapman notes.How did the Spider

form？It's anyone's guess.

Besides the Spider, MESSENGER's first pass of Mercury revealed a surprisingly large number of craters.These bowl-shaped depressions form when objects from outer space strike a planet or moon, or when material ejected by these impacts strikes outside the initial crater.Craters can also develop when volcanoes erupt.

In just one section of one of MESSENGER's images, Chapman counted more than 700 small craters.Each measured between a quarter-mile and several miles across.By counting craters, measuring them, and analyzing their locations, he hopes to figure out when these features formed.

Studying craters can also show if and when molten material emerged from deep within the planet's interior.MESSENGER has already revealed that there is a surprising amount of this volcanic activity.

And that's only the beginning.Further observations will reveal more about what's happening inside the planet.

6．Which of the Mercury's features is different from the Earth?

A．V olcanoes. B．Spiders.

C．Rock. D．Cliffs.

7．Which of the following statements is TRUE?

A．There may be spider-shaped formation on Venus.

B．There are more than 700 small craters on Mercury.

C．Chapman has found out when these features formed.

D．MESSENGER has revealed Mercury entirely.

8．The right order of the following affairs should be ________.

①MESSENGER sent back many images.

②The Spiders formed on Mercury.

③Scientists studied the features carefully.

④MESSENGER reached its destination.

A．①②③④B．②④①③

C．②①③④D．②①④③

9．What can be inferred from the passage?

A．Scientists have studied Mercury for more than 30 years.

B．A Spider has 50 leglike trenches.

C．A small crater measured between a quarter-mile and several miles across.

D．MESSENGER has never passed by Mercury before.

答案

课时达标训练(十二)

Ⅰ.1.解析：选B考查动词短语辨析。句意：我们把一块布横挂在窗子上遮住阳光。block up“塞住”；block out“挡住(光线)”；break out“战争、火灾、疾病的突然发生”；break up“解散；分手”。

2．解析：选D句意：她对幼儿园的孩子总是很温和，从来不打不骂。gentle“温和的；温柔的”，符合题意。careful“仔细的；认真的；细心的”；calm“心情平静的；风平浪静的”；strict“严厉的；严格的”。

3．解析：选B考查动词短语辨析。句意：经过很多年与疾病作斗争之后，病人最终康复了。pull out“抽出；取出”；pull through“康复”；pull in“进站”；pull off“脱掉”。

4．解析：选A break out“(战争、火灾等)突然发生；爆发”，是不及物动词词组，无被动语态；put out“熄灭；扑灭；出版；发布”，是及物动词词组，有被动语态；go out“(灯、火等)熄灭；(年、月等)结束”。句意：没有人知道火灾是什么时候发生的，但是他们知道大火是第二天早上扑灭的。

5．解析：选A考查动词短语辨析。句意：在参观动物园时，所有游客都被告知当心那些危险的动物。watch out“注意；当心”，与介词for连用。take care常与介词of搭配；be careful常与with搭配或与不定式连用；watch over“照看；看守”，为及物动词短语。

6．解析：选B根据词序排列可知，只有B项符合as ...as ...结构的基本构成形式“as

＋adj.＋a/an＋可数名词单数＋as”。

7．解析：选B考查倍数表达法。英语中常见的表达倍数的句型有：①... times＋as ＋adj./ad v. (原级)＋as ...; ②...times＋adj./ad v.(比较级)＋than ... ; ③...times＋the length/width/...＋of...。

8．解析：选D break out“(战争、火灾等)突然爆发；发生”；cheer on“向……欢呼；鼓励”；break up“打破；中断”；cheer up“使高兴；使振奋；高兴起来；振作起来”。句意：灾难过后我们应该尽最大努力鼓励那些受灾的人。

9．解析：选D句意：摩托车跑得太快了，结果撞在围栏上。crash into“撞上……”，为固定搭配。

10．解析：选D句意：既然你不愿意去那儿，你就待在原地。although“尽管”；while“当……时；尽管；而；却”；as if“好像”；now that“既然；由于”，表示已为人们所知的原因。

Ⅱ.1.解析：选B细节理解题。根据第一段内容可知：“his two sisters and his brother”与A矛盾；“...his father died when he was 10”与C矛盾；“...he went to Italy, where he spent the next 10 years”与D矛盾。因此正确答案为B项，改名字也就暗指他曾经叫过Niklas Koppornigk。

2．解析：选C推理判断题。由第二、三段可知，哥白尼研究天文学即研究太阳周围的行星。由此推出答案。

3．解析：选C推理判断题。由第三段第四、五句可知，哥白尼是通过观察和推理来发展自己的理论的。

4．解析：选B推理判断题。由最后两段可知，哥白尼多年一直没有宣布自己的理论，直至晚年才敢出版著作。

5．解析：选D细节理解题。由最后一段第四句可以得出是他朋友建议他出版这部书。

6．解析：选B细节理解题。由第三段可知四项都是水星的特征；另外，根据常识可知地球同样具有A、C、D三项特征。

7．解析：选A细节理解题。由第四段可知A项正确，而由第六段的一、三句及最后一段判断B、C、D项错误。

8．解析：选C事件排序题。由第二段第一句可知，MESSENGER是在去目的地的行程中经过水星时发回了图像。并且科学家对图像进行研究应是在MESSENGER到达其遥远的目的地之前。

9．解析：选D推理判断题。由第一、三段可知A、B项错误；C项虽然正确，但却是第六段中的原句并非推测；由第五段首句可以推测出D项正确。

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人教新课标高中生物必修二第1节 孟德尔的豌豆杂交实验(一) 第1课时 提高练习

第1节孟德尔的豌豆杂交实验（一）（第1课时）1．孟德尔通过杂交实验发现了一些有规律的遗传现象，通过对这些现象的研究提出了遗传的基本规律。在下列各项中，哪项不是出现这些有规律遗传现象不可缺少的因素（）A．F1体细胞中各遗传因子表达的机会相等 B．F1自交后代发育成活的机会相等 C．各遗传因子在F2体细胞中出现的机会相等 D．每种类型雌配子与每种类型雄配子相遇的机会相等 2．下表是桃树花色的三组遗传实验结果，据此分析下列叙述错误的是（） A．组合①的红花亲本与F1红花植株均为杂合子 B．组合②③均可判断这对性状的显隐性关系 C．组合③的F1中纯合红花所占比值为1/4 D．组合③，F1红花中，杂合子所占比值为1/2 3．现有两块农田，农田A混合种植了杂合高茎豌豆和矮茎豌豆，而农田B混合种植了甜玉米和杂合非甜玉米。豌豆的高茎和矮茎与玉米的甜和非甜均受一对遗传因子控制，不考虑其他植物，下列相关叙述，错误的是（） A．豌豆的高茎对矮茎为显性，玉米的非甜对甜为显性 B．农田A中矮茎豌豆所结种子长成的植株均表现为矮茎 C．农田B中杂合非甜玉米所结种子长成的植株1/4为甜玉米 D．农田A中各植株自花受粉，而农田B中各植株随机受粉 4．已知豌豆种子子叶的黄色与绿色是一对遗传因子Y、y控制的，用豌豆进行下列遗传实验，具体情况如下： 实验一实验二

P 黄色子叶（甲）×绿色子叶（乙）P 黄色子叶（丁） ↓↓自交 F1黄色子叶（丙）绿色子叶F1黄色子叶（戊）绿色子叶 1 ： 1 3 ：1 请分析回答： （1）用豌豆做遗传实验容易取得成功的原因之一是________________________。 （2）从实验____可判断这对相对性状中________是显性性状。 （3）实验二黄色子叶戊中能稳定遗传的占________。 （4）实验一子代中出现黄色子叶与绿色子叶的比例为1:1，主要原因是黄色子叶甲产生的配子种类及其比例为______。 （5）实验中一黄色子叶丙与实验二中黄色子叶戊杂交，所获得的子代黄色子叶个体中不能稳定遗传的占_______。 5．豌豆花的腋生和顶生是一对相对性状，受一对遗传因子B、b控制。如下表是几组杂交实验结果。 根据以上实验结果，分析回答下列问题。 （1）根据组合______可判断出显性性状是______（填“顶生”或“腋生”）。 （2）组合二亲本的遗传因子组成是______和______，理论上其后代腋生豌豆中纯合子所占比例为______（填分数）。 （3）组合三后代的腋生豌豆中杂合子占______（填百分比）。

unit12 4课时

济南第三十四中学预学案 学科 英语 第 15 周 编号： 4 主备人 王娜 审核 迟秀英 吕多新 1 课题：Unit 12What did you do last weekend? Section B(2a----2c) 一、【学习目标】 要求：1、词汇： high, India, tent, surprise, snake, scared, start, jump, wake,forest 2、词组：went camping, took a long bus ride,put up,made a fire, so …that …,got a surprise,look out of jump up and down, woke up ,feel sth. doing 3、Talk about past events 二、【学习重点】Talk about past events 三、【预学引领】 1 读：阅读单词表，拼读新单词。 tent, surprise, snake, scared, start, jump, wake,forest, move ，jump 2 划与写：阅读Section B(2a----2c)，在课本中划出词组和句子，并写在下列横线上。 1) 高中毕业 __________________2）去露营______________3）乘很长时间车______________ 4)搭帐篷____________ 5）生火取暖__________________ 6) 如此…以至于…_____________ 7)吃惊_____________ 8)对…大喊_______ 9)跳上跳下___________ 10)弄醒_____________ 3 练与思：1)在那儿我们搭起帐篷，生火取暖，并在上面做饭。 There we _____ _____ our tents and ______ ______ _____ to _____ us ______ and ______ food _____. 2)在头一天晚上，我们坐在月亮下给彼此讲故事。 ______ the first night, we just _____ _____ the moon and _____ _____ ______ stories. 3)我如此劳累以至于很早去睡觉了。 I was _____ ______ _____ I _____ _____ ______ early. 4)当我望向帐篷外面时，我们看到一条大蛇在火堆周围睡觉。 When we _____ ______ _____ our tent, we ______a big snake ______ near the fire. 5）我如此害怕以至于不敢移动。I was _____ ______ _____ I _____ _______. 6）我朝父母大喊，让他们知道危险的情况。 I _____ _____ my parents _____ ______ them _____ ______ the ______. 7)这吵醒了大蛇，它快速爬进了湖边的森林。 This_____ the snake _____ and it ______ ______ the ______ near the lake. 8)后来我父亲告诉我蛇没有耳朵，但能感觉到东西在晃动。 My dad _____me later that snakes have ears but can _____ things _______. 三．知识点拨： 1 finish high school 高中毕业 finish doing sth. He finished doing his homework yesterday. 2 so ….that … 太…以至于… Eg ：The game is _____interesting _____ I want to play it again. 3 see/watch/feel sb.doing sth. 看到/觉得某人在做某事 4 It ’s important not to do sht. 不要做…是很重要的 not to do 不定式的否定 五、课堂检测 ( ) 1. I _____ / w ??k/ up at five this morning. A. woke B. week C. wake D. weak ( ) 2. They had to _____ a tent because of the rain? A. put on B. put up C. put off D. put away ( ) 3. Don’t’ keep us _____ for long again. A. wait B. waitting C. waiting D. to wait ( ) 4. If you _____ the window, you ’ll see the white cloud. A. look out of B. look out C. look at D. look after ( ) 5. You study ____ hard ____you ’re sure to pass the test. A. enough , to B. as , as C. too , to D. so , that 6. Jane started __________ (clean) her bedroom when her mother came back. 7. I hear a girl __________ (sing) in the next room now. 8. They __________ (fly) to London the day before yesterday. 9. It wasn ’t dark until they __________ (put) up their tents. 10. The noise __________ (wake) the man up early yesterday morning. 11. I was too surprised to say any word. (同义句) I was __________ surprised __________ I __________ say any word. 12. We saw a big snake sleeping near the fire. (划线提问) __________ _________ you __________ a big snake __________ near the fire? 13. To do sports is good for our health. (同义句) _______ good for our health _______ _________ sports. 14. 两周前我们去露营了。We __________ __________ two weeks __________. 15. 高中毕业后他在工厂当了一名工人。 He __________ __________ a worker in a factory after __________ __________ school. 16. 春节前大批人乘坐长途车回老家与家人团聚。 __________ a lot of people __________ a long bus __________ to their hometown to get together with their families __________ Spring Festival. 17.数千年前的人们就知道如何生火取暖。 Thousands of years __________ people __________ how __________ __________ the fire to __________ them warm. 下面是 My family were very 11. last weekend. On Saturday morning,my parents 12. shopping. My brother Henry 13. basketball with his friends. I 14. for my math test at home. In the afternoon. I went to the beach. On Saturday evening,my family 15. dinner together. Then we went to the 16. . On Sunday morning, my brother and I 17. our rooms. In the afternoon my grandparents visited us. We were happy 18. them. They had dinner with us. After dinner, we 19. TV . At 8:30 pm. I went to bed because I 20. a little tired. Yours, David 11. 12. 13. 14. 15. 16. 17. 18. 19. 20.

2020年七年级英语下册基础训练Unit4Don’teatinclass讲义(新版)人教新目标版

Unit 4 Don’t eat in class.（讲义）Words and Expressions rule /ru?l/ n. 规则；规章 arrive /?'ra?v/ v.到达 (be) on time 准时 hallway /'h??lwe?/ n. 走廊；过道 hall /h??l/ n. 大厅；礼堂 dining /'da?n??/ hall 餐厅 listen /'l?sn/ v. 听；倾听 listen to…听…… fight /fa?t/ v. & n. 打架；战斗 sorry /'s?ri/ adj. 抱歉的；难过的；惋惜的outside /,a ?t'sa?d/ adv. 在外面adj. 外面的 wear /we? / v. 穿；戴 important /?m'p??(r)tnt/ adj. 重要的 bring /br??/ v. 带来；取来 uniform /'ju?n?f??(r)m/ n. 校服；制服quiet /'kwa ??t/ adj. 安静的 out /a?t/ adv. 外出 go out 外出(娱乐) practice /'pr?kt?s/ v. & n. 练习 dish /d??/ n. 碟；盘 do the dishes 清洗餐具 before /b?'f??(r)/ prep. & conj. 在……以前adv. 以前 make (one’s) bed 铺床 dirty /'d??(r)ti/ adj. 脏的 kitchen /'k?t??n/ n. 厨房

more /m??(r)/ adj. & pron. 更多(的) noisy /'n??zi/ adj. 吵闹的 relax /r?'l?ks/v. 放松；休息 read /ri?d/ v. 读；阅读 terrible /'ter?bl/ adj. 非常讨厌的；可怕的 feel /fi?l/ v. 感受；觉得 strict /str?kt/ adj. 严格的；严厉的 be strict (with sb) (对某人)要求严格 remember /r ?'memb?(r)/ v. 记住；记起 follow /'f?l ??/ v. 遵循；跟随 follow the rules 遵守规则 luck /l?k/ n. 幸运；运气 keep /ki?p/ v. 保持；保留 hair /he?/ /her/ n. 头发；毛发 learn /l??(r)n/ v. 学习；学会 Clark /klɑ?(r)k/ 克拉克(姓；男名) Amy /'e?mi/ 埃米(女名) Molly /'m?li/ 莫莉(女名) New York /,nju?'j??(r)k/ 纽约 Role-play John: Hi, my name’s John. It’s my first day at school. Alice: Hi, John. I’m Alice. This is a great school, but there are a lot of rules. John: Really? What are some of the rules? Alice: Well, don’t be late for class. This is very important. John: OK, so we must be on time. Can we bring music players to school? Alice: No, we can’t. And we al ways have to wear the school uniform. John: I see. Alice: Oh, and we also have to be quiet in the library.

(找因数)公开课教案

小学部公开课教案

２、思考：请同学们在合作交流中总结出找一个数的因数的基本方法。 （或者用乘法思路想：哪两个数相乘得12？然后一对一 对找出来。） 全班交流师：我发现同学们真的很聪明，谁愿意把你的想法说给大家听？ （每个小组由一名代表在全班汇报思考的过程，再次体会“想乘法算式”找一个数的因数的方法。） 同学们用12 个小正方形摆出了各种各样的长方形，你能用算式表示出你一共摆了多少个吗？ 学生回答，及时板书：1×12=12 2 ×6=12 3 ×4=12 师：由黑板上整理出的算式可见，12 的因数有哪些呢？（1、 12 、2、6、3、4） 引导思考：找一个数的因数怎样做到即不重复又不遗漏呢？（1、2、3、4、6、12）3、引导学生用除法算式找一个数的因数。除了用乘法算式找12 的因数，我们能不能用除法算式找出12的全部因数呢？ 根据学生回答，师板书：12÷1=12 12 ÷2=6 12 ÷3=4 4、小结：找一个数的因数，可以用乘法依次一对一对的找。这样有顺序的给一个倍数找因数，好处就是不重复、不漏找。5、（板书：有序） 6、小练笔：用自己喜欢的方法找18 的因数 7、指学生到黑板上板演。 8、观察12和18的因数，你发现了什么？根据学生回答，教师小结：12 和18 的最小因数是1，最大因数是它们本身，一个数的因数的个数是有限的。 四、巩固练习1、师：同学们已经掌握了找因数的方法，现在看看谁找得快，请同学们做课本第38页的练一练的第2 题。 2 、师：同学们已经学会了拼长方形找因数，现在能不能在小方格中画出长方形找因数呢？请做第38 页的第1题。（1×16＝16 2 ×8＝16 4 ×4＝16） （16 的因数：1、2、4、8、16） 五、总结与评价师：这节课你学会了什么呢？用学到的方法我们都可以做些什么？ （拼图形的方法找因数；用找因数的方法设计图形；用找因数的方法解决问题。??）通过观察比较得出一个数的因数的个数是有限的，最小的因数是1，最大的因数是它本身。 设计有层次的练习，不但能够帮助学生很好地掌握找一个数的因数的方法，而且还能够发展学生的思维，提高学生分析问题的能力，培养学生学习数学的兴趣。

超级资源(共24套119页)人教版高一生物必修二(全册)同步练习 课后作业汇总

超级资源（共24套119页）人教版高一生物必修二（全册）同步练习课后作业汇总 孟德尔豌豆杂交实验（一）（总分：71分） 一．选择题(每题2分) 1．下列各对性状中, 属于相对性状的是（） A．狗的长毛和卷毛 B．棉花的掌状叶和鸡脚叶

C．玉米叶梢的紫色和叶片的绿色 D．豌豆的高茎和蚕豆的矮茎 2．“假说—演绎法”是现代科学研究中常用的一种方法, 下列属于孟德尔在发现基因分离定律时的“演绎”过程的是( ) A．生物的性状是遗传因子决定的 B．由F2出现了“3∶1”推测, 生物体产生配子时成对遗传因子彼此分离 C．若F1产生配子时成对遗传因子分离, 则测交后代会出现两种性状, 比例接近1∶1 D．若F1产生配子时成对遗传因子分离, 则F2中三种基因个体比接近1∶2∶1 3．狗的卷毛（A）对直毛（ａ）是显性, 判断一只卷毛狗是否是纯合体, 最好选用与它交配的狗是（） A．纯种卷毛 B．直毛 C．杂种卷毛 D．A．B．C都对 4．下列叙述中正确的是（） A.纯合体自交的后代是纯合体 B.杂合体自交的后代是杂合体 C.两种纯合体杂交其后代仍是纯合体 D.杂合体杂交的后代全是杂合体 5．杂合子高茎豌豆自交, 后代中已有16株为高茎, 第17株还是高茎的可能性是（）A．0 B．25% C．75% D．50% 6．将具有一对等位基因的杂合子, 逐代自交3次, 在F3代是纯合子的比例为（）A．1/8 B．7/8 C．7/16 D．9/16 7．水稻中非糯性(W)对糯性(w)为显性, 非糯性品系所含淀粉遇碘呈蓝黑色, 糯性品系所含淀粉遇碘呈红褐色。下面是对纯种的非糯性与糯性水稻的杂交后代进行观察的结果, 其中能直接证明孟德尔的基因分离定律的一项是 ( ) A．杂交后亲本植株上结出的种子(F1)遇碘全部呈蓝黑色 B．F1自交后结出的种子(F2)遇碘后, 3/4呈蓝黑色, 1/4呈红褐色 C．F1产生的花粉遇碘后, 一半呈蓝黑色, 一半呈红褐色 D．F1测交所结出的种子遇碘后, 一半呈蓝黑色, 一半呈红褐色 8．下列四组交配中, 能验证对分离现象的解释是否正确的一组是（） Ａ．ＡＡ×ＡａＢ．Ａａ×ａａＣ．Ａａ×ＡａＤ．ＡＡ×ａａ 9．基因型为ＡＡ的个体与基因型为ａａ的个体杂交产生的Ｆ1进行自交, 那么Ｆ2中的纯合子占Ｆ2中个体数的（） Ａ．２５％Ｂ．５０％Ｃ．７５％Ｄ．１００％ 10．基因分离定律表明, 杂合子（） A．不能稳定遗传, 自交后代有性状分离 B．不能稳定遗传, 自交后代无性状分离

新目标七下英语unit12第四课时导学案

第四课时Section B(2a~3b) 当堂训练 Ⅰ.根据句意及首字母提示填写单词。 1．I saw a big m________ in the sky tonight. 2．Don't pick apples on the tree. They are too h________. 3．My brother studied at No.1 Middle School three years a________. 4．Tony s________ to learn Chinese last year. 5．Sam got lost in the f________ with his friend yesterday. Ⅱ.用括号内所给单词的适当形式填空。 6．Li Hui's family ________(move) to Shanghai ten years ago. 7．She got a ________(surprised) when she saw the snake. 8．Mom ________(wake) me up at six this morning. 9．Betty was so ________(scare) that she couldn't move. 10．This was a very ________(use) lesson for her. Ⅲ.单项选择。 ()11.Where can I ________these pictures? A．get up B．give up C．look up D．put up ()12.They arrived in Beijing three days ________. A．before B．ago C．behind D．after ()13.(兰州中考)I've been so bored for a long time. I hope to have ________ to do. A．exciting anything B．nothing exciting C．something interesting D．good something ()14.________，Tom！It's time to get up and go to school. A．Wake up B．Make up C．Grow up D．Look up ()15.We looked at each other ________surprise when we heard a bird singing “Happy birthday to you”． A．in B．to C．by D．at Ⅳ.根据汉语意思完成句子，每空一词。 16．别朝窗外看，请认真听讲。 Don't ________ ________ ________ the window.Please listen to the teacher carefully. 17．昨晚比尔如此累，以至于很早就睡觉了。 Bill was ________ ________ ________ he went to sleep early last night. 18．不要跳上跳下。 Don't ________ ________ ________ ________. 19．蛇虽然听不见，但是它们能感觉到东西在动。 Snakes can't hear anything，but they can ________ things ________. 20．昨晚我看了一期有趣的访谈节目。 I saw an interesting ________ ________ last night. 名校讲坛 1．ago adv.以前 常用于“一段时间＋ago”结构中，表示“……以前”，用于一般过去时态。eg： two days ago两天前 a month/year ago一个月/一年以前 2．put up搭起；举起 【拓展】 put up a tent搭建帐篷 put up hands举起手 put down放下 put off推迟 3．make a fire生火 4．keep sb./sth.＋adj.(宾补)保持…… 5．on the first night在第一天晚上 表示在具体某一天的晚上用介词on；而“在晚上”是at night。 6．each other互相；相互 help each other互相帮助 learn from each other互相学习 7．surprise (1)作名词，意为“惊奇；惊讶”。常用短语有：get a surprise吃惊，in surprise吃惊地，to one's surprise令某人吃惊的是 (2)作动词，意为“使吃惊”。surprise sb.使某人吃惊。 【拓展】 (1)surprising作形容词，意为“令人吃惊的”，形容事物。 (2)surprised作形容词，意为“感到吃惊的”，形容人。 8．look out of朝……外看 9．start v．开始；着手。作“开始”讲，相当于begin。 start to do/doing sth.开始做某事 10．jump up and down跳上跳下 11．wake sb. up把某人弄醒 wake up醒来 第四课时Section B(2a～3b)

基础英语第4册练习册1~8单元练习及答案

Unit 1 1. Although most dreams apparently happen__, dream activity may be provoked by external influences. A. spontaneously B. simultaneously C. homogeneously D. instantaneously 2. She let out a terrified __ when she heard the news of the tragedy happened on September 11 in USA, A. cheer B. yell C. sigh D. curse 3. The ties that bind us together in common activity are so __that they can disappear at any moment. A. trivial B. fatal C. tentative D. feeble 4. She __ the person who was in her way A, swore at B. promised C. swore in D. sworn at 5. Mary made steady __ in English after she put her heart into it. A. advance B. improvement C. progress D. program 6. He is the __ husband for her. A. idea B. ideal C. idle D. idiot 7. We naturally __ the name of Darwin with the doctrine of evolution. A. associate B. vain C. reveal D. worship 8. When we had finished dinner, Mary asked the waiter for the __. A, note B. cheque C. bill D. tip 9. The murderer __ a dagger into her heart. A. plugged B. penetrated C. pressed D. thrust 10. The women were able to equal or __ the men who worked beside them. A. surpass B. exceed C. overtake D. lagged Unit 2 1. For many patients, institutional care is the most __ and beneficial form of care. A. pertinent B. appropriate C. acute D. persistent 2. Several international events in the early 1990s seem likely to ___ , or at least weaken, the trends that emerged in the 1980s. A. revolt B. revolve C. reverse D. revive 3. The elderly Russians find it hard to live on their state __ . A. pensions B. earnings C. salaries D. donations 4. There is no __ attached to what you are doing, so you shouldn' t be ashamed. A. stigma B. enigma C. dilemma D. aroma 5. The boat ___ down the river. A. drifted B. floated C. drove D. drilled 6. The conditions of the contract must be __ exactly. A. achieved B. completed C. fulfilled D. finished 7. One of his eyes was injured in an accident, but after a __ operation, he quickly recovered his sight. A. delicate B. considerate C. average D. general