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一、选择题（每小题3分，共36分）

1．轻弹簧上端固定，下系一质量为m 1的物体，稳定后在m 1下边又系一质量为m 2的物体，于是弹簧又伸长了?x ．若将m 2移去，并令其振动，则振动周期为

(A) g m x m T 122?π= (B) g

m x

m T 212?π= (C)g m x

m T 2121?π= (D) g

m m x m T )(2212+π=? [ ]

2．有两个相同的容器，容积固定不变，一个盛有氦气，另一个盛有氢气（看成刚性分子的理想气体），它们的压强和温度都相等，现将5J 的热量传给氢气，使氢气温度升高，如果使氦气也升高同样的温度，则应向氦气传递热量是 ［ ］

(A) 6 J (B) 5 J (C) 3 J (D) 2 J

3．一机车汽笛频率为750 Hz ，机车以25 m/s 速度远离静止的观察者。观察者听到的声音的频率是（设空气中声速为340 m/s ）。 (A) 810 Hz (B) 685 Hz (C) 805 Hz (D) 699 Hz [ ]

4．一质点在X 轴上作简谐振动，振幅4A cm =，周期2T s =，取其平衡位置为坐标原点，若0t =时刻质点第一次通过2x cm =-处，且向X 轴负方向运动，则质点第二次通过2x cm =-处的时刻为 ［ ］

（A ）1s （B ）32s （C ）3

4

s （D ）2 s

5．如图所示，平板玻璃和凸透镜构成牛顿环装置，全部浸入n ＝1.60的液体中，凸透镜可沿O O '移动，用波长λ＝500 nm(1nm=10-9m)的单色光垂直入射。从上向下观察，看到中心是一个暗斑，此时凸透镜顶点距平板玻璃的距离最少是

(A) 156.3 nm (B) 148.8 nm

(C) 78.1 nm (D) 74.4 nm

(E) 0 [ ]

6．一横波以波速u 沿x 轴负方向传播，t 时刻波形曲线如图所示，则该时刻 ［ ］

(A) A 点振动速度大于零 (B) B 点静止不动 (C) C 点向下运动

(D) D 点振动速度小于零

7．1 mol 刚性双原子分子理想气体，当温度为T 时，其内能为 [ ] (A)

RT 23

(B)kT 23

(C)RT 2

5 (D)

kT 2

5

（式中R 为普适气体常量，k 为玻尔兹曼常量）

8．如图所示，折射率为n 2、厚度为e 的 透明介质薄膜的上方和下方的透明介质的折 射率分别为n 1和n 3，已知n 1＜n 2＜n 3．若用 波长为λ的单色平行光垂直入射到该薄膜上， 则从薄膜上、下两表面反射的光束①与②的 光程差是 [ ]

(A) 2n 2 e －λ / 2 (B) 2n 2 e

(C) 2n 2 e + λ / 2 (D) 2n 2 e －λ / (2n 2)

n=1.68

n=1.60

n=1.58

O ' O

λ

x

u

A y B

C

D O

n 2 n 1 n 3

e

① ②

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新目标八年级英语下第六单元模拟试题 班级姓名 一.用所给词的适当形式填空： 1. Thanks for ______（send）me the snow globe. 2. I have lived in this apartment since I ______（come）to China. 3. What’s the ______ （common）hobby? 4. I’m quite ______ （interest）in the writer job. 5. They _______（watch）a video when I arrived there. 6. He _______（write）the letter to his pen pal since 9: 00 a.m. 7. The more I learn about Chinese history, the more I enjoy _______（read）history books. 8. How long has he _______(join)in the army so far? 9. I think she’s good at _______ （skate）and she’s an excellent _______（skate）. 10. They said they _______（raise）money for charity the next week. 二.根据句意用for或since填空。 1. It’s ten years ______ we met each other last time. 2. He has taught English _______ 25 years. 3. The Greens have lived on the farm ______ 1990. 4. They have been practicing the guitar _______ two hours. 5.－How long have you been a reporter? －_____ 8 years ago. 6. I haven’t gone for a walk in the park ________ a long time. 7. He’s been collecting stamps _______ he was in primary school. 8. Peter has been to summer camp ________ 3 times. 三.单项选择： （）1.－When did you get your first pair of skates? －_______. A. For 6 years B. Since I was 7 years old. C. When I was 7 years old. D. Since 6 years ago. （）2. He raised ______ for the charity to help the poor children. A. thousand of dollars B. thousand of dollar C. thousands of dollars D. thousands of dollar （）3.－______ does the first class begin? －At 7:40. A. How long B. Where C. When D. How （）4. Mr. Smith _______ here for about two hours. A. has left B. left from C. went away from D. has been away from （）5. _____ of them has an English dictionary. A. Every B. All C. Both D. Each （）6. ______ is really hard _______ them to climb up the mountain at night. A. This, to B. It, for C. This, for D. It, to （）7. Signs can been seen on the road _______ can people see them? A. Where else place B. Where place else C. Where else D. Anywhere （）8.－Who cleaned the blackboard yesterday, Dick? －John ______. A. cleaned B. does C. did D. is （）9. Do you know _______ over there? A. What happens B. What was happened C. What is happening D. What did happen （）10. I’m waiting for my friend. If he _______, I will go swimming alone. A. doesn’t come B. won’t come C. will come D. is coming 四.句子配对。 （）1. How long did you sing today? （）2. Do you skate every day? （）3. When did you start to play tennis? （）4. Was this your first inline skating marathon? （）5. What’s your hobby? （）6. How long have you been driving? （）7. What do you collect? （）8. How does he make the toy? A. Yes, I do. B. For two hours. C. He makes it with bamboo and silk. D. No, I skated in a marathon last year. E. I like collecting. F. Since I was 20 years old. G. Snow globes. H. Last year. 五.从方框中选择正确的句子完成对话。 Liang Xing: Hi, Wang Fei! It’ s a long time since we met last. 1 Wang Fei: I’ve been to Kunming with my parents. Liang Xing: 2 Wang Fei: Yes, of course. And we saw many different kinds of flowers there. 3 Liang Xing: Did you meet any foreign visitors? Wang Fei: Yes, a lot. And I talked with some of them. Liang Xing: 4 Wang Fei: They said we were very friendly. Liang Xing: 5 Wang Fei: The delicious food and the places of interest. A. What did they say about Chinese people? B. You’ve just come back, haven’t you? C. Did you have a good journey? D. What did they like best about China? E. Where have you been? F. There were many foreigners, too. G. All of them were very beautiful. 六.根据汉语提示完成下列句子。 1.孩子们对玩电脑游戏很感兴趣。 Children are very ____ _____ ______ computer games. 2.昨天我买了一双运动鞋。 Yesterday I bought _____ _____ _____ sports shoes. 3.我买不起这本字典了。因为我用完了钱。 I can’t afford to buy the dictionary, because I have ____ _____ _______ my money. 4.非常感谢你把这些精美的邮票送给我。 Thanks a lot for ______ ________ the beautiful ________. 5.自我7岁起，我就一直听音乐。 I have been listening to music ______ ______ ______ _______ old. 6.她去过北京两次。 She ______ ______ to Beijing twice. 7.你喜欢集邮吗？ Do you like _____ ________? 8.她今天滑冰滑了多长时间了？ How long ____ ______ _______ skating today? 七.完型填空： Linda has brought all her books home today. After lunch she puts the 1 out on the table and begins to do the homework for each subject. She begins with math. She finds that she has no 2 . She looks for it everywhere, but doesn’t find it. After a little while, she doesn’t feel comfortable 3 . She moves to the sofa with all her books. Now the sunlight from the window shines 4 . She moves back to the table. She has made a good start on her 5 when she stops to listen to her mother talking on the telephone. When she comes back to her work, her little sister Betty asks her for some 6 . Betty joins her at the table and begins to draw a horse. Linda has to 7 her. When they have finished, both go to the 8 . Linda eats some cakes there and brings a tin Coca Cola to her table. She says to herself, “I’ll finish my English exercises 9 at school before classes start.”Then she starts to review her history lesson, but she feels 10 . She doesn’t know what she is reading. She closes her books and goes to bed. 1. A. balls B. books C. toys D. pictures