精品一区二区免费在线观看_国产精品久久久久久av福利软件_97成人精品区在线播放_国内成人精品一区

第二節　 聽取信息(共5小題；每小題1分，滿分5分)

聽下面一段對話，請根據題目要求，從所聽到的內容中獲取必要的信息，填入答題卡標號為16-20的空格中。聽錄音前，你將有10秒鐘的閱題時間，錄音讀兩遍。你將有60秒鐘的作答時間。

Suspect(嫌疑犯)

第一節　 聽力理解(5段共15小題，每小題2分，滿分30分)

每段播放兩遍。各段后有幾個小題，各段播放前每小題有5秒鐘的閱題時間。請根據各段播放內容及其相關小題，在5秒鐘內從題中所給的A、B、C項中，選出最佳選項，并在答題卡上將該項涂黑。

聽第一段對話，回答第1-3題。

1. What is the probable relationship between the two speakers?

A. Teacher and student.

B. Boss and secretary.

C. Workmates.

2. What are the two speakers talking about?

A. Using the left hand.

B. Running machines.

C. Designing machines.

3. What can we learn from the conversation?

A. The woman only uses her right hand.

B. Left-handers can't run the machines.

C. The woman is more skillful than the man.

聽第二段對話，回答第4-6題。

4. Where does the conversation most likely take place?

A. In a travel agency.

B. At the reception desk of a hotel.

C. At the booking office of the airport.

5. When must the woman leave her room?

A. At 2:00 p.m. tomorrow.

B. At 2:30 p.m. tomorrow.

C. At 3:30 p.m. tomorrow.

6. What suggestion does the man make for the woman' s departure(啟程)?

A. The woman should leave the hotel at 2 p. m.

B. The woman should stay in the hotel for another day.

C. The woman should leave the hotel a bit earlier in case of traffic jams.

聽第三段獨白，回答第7-9題。

7. What does the woman think of working on movies?

A. Exciting but very hard.

B. Hard and boring.

C. Dangerous.

8. What kind of shots are used in the film?

A. The first shots.

B. The best shots.

C. The shots done by famous directors.

9. What does the woman ask the man to do?

A. Try to be a famous film star.

B. Visit the studio.

C. Come and see a film.

聽第四段對話，回答第10-12題。

10. What is the weather like in the man's place now?

A. Windy and snowy.

B. Sunny but windy.

C. Cold and wet.

11. What is the weather going to be like in the woman's place?

　A. Sunny and warm.

　B. Windy and rainy.

　C. Sunny but cold.

　12. What is the woman's attitude towards the man's advice?

　A. She takes it seriously.

　B. She doesn't care about it.

　C. She worries about it.

　聽第五段獨白，回答第13-15題。

　13. What did a boy do?

　A. He suggested that they should build another road.

　B. He volunteered to dig another road.

　C. He volunteered to move the rock away.

　14. When was the rock no longer there?

　A. The following day.

　B. The second time.

　C. After a while.

　15. How did the boy solve the problem?

　A. He dug another road.

　B. He dug a hole next to the rock.

　C. He asked many people to move the rock together.

16．質量為m的長木板A靜止在光滑水平面上，另兩個質量也是m的鐵塊B、C同時從A的左右兩端滑上A的上表面，初速度大小分別為v和2v，B、C與A間的動摩擦因數均為μ。(1)求B、C剛滑上長木板A時，A的加速度(2)為使B、C不相撞，A木板至少多長？

15．質量為m=5×10³ kg的汽車在t₀=0時速度v₀=10 m／s,隨后以P=6×10⁴w的額定功率沿平直公路繼續前進，經72s達到最大速度，設汽車行駛過程中所受阻力大小恒為f=2.5×10³ N。求：

(1)汽車能達到的最大速度v_m;　 (2)汽車在72s內經過的路程s。

14．.如圖所示，一高度為h=0.2 m的水平面在A點處與一傾角為θ=30°的斜面連接，一小球以v₀=5 m/s的速度在平面上向右運動.求小球從A點運動到地面所需的時間(平面與斜面均光滑，取g=10 m/s²).

某同學對此題的解法為：小球沿斜面運動，則=v₀t+g sinθ·t²，

由此可求得落地的時間t.

問：你同意上述解法嗎？若同意，求出所需時間；若不同意，則說明理由并給出你認為正確的解答。

13．蕩秋千是大家喜愛的一項體育運動。隨著科技迅速發展，將來的某一天，同學們也會在其它星球上享受蕩秋千的樂趣。假設你當時所在星球的質量是M、半徑為R，可將人視為質點，秋千質量不計、擺長保持為L、擺角小于90°、不計阻力，萬有引力常量為G。那么，

(1)該星球表面附近的重力加速度等于多少？

(2)在擺角不大于90°的情況下，你經過最低位置時的速度v₀不能超過多少？

12．(9分)某探究小組設計了如下的探究橡皮筋的彈性勢能與拉長量之間關系的實驗：將一長木板放在桌面上并調至水平，橡皮筋一端固定在墻上，另一端被靜止的小車拉長了d。小車釋放后沿長木板運動，帶動穿過打點計時器的紙帶，如下圖所示。打點計時器電源頻率為50Hz，小車質量為0.2kg,實驗進行了三組，各次小車由靜止開始運動的位置不同(即橡皮筋的拉長量d不同)，分別打出紙帶，選擇了三條紙帶如下圖所示(圖中最下面的是直尺)。

(1)根據紙帶數據完成上面的表格，其中V_max為小車橡皮筋拉動的最大速度：

(2)橡皮筋的彈性勢能E_p與橡皮筋拉長量d之間的函數關系式是E_p=　　　 。

(3)要減少實驗誤差，該設計可改進的措施是　　　　　　　　　　　　　 。

11．(3分)在利用重錘下落驗證機械能守恒定律的實驗中正確的是　　

A、應該用天平稱出重錘的質量。

B、應該選用點跡清晰，第一、二兩點間的距離接近2mm的紙帶。

C、操作時應先放紙帶再接通打點計時器的電源。

D、打點計時器應接在電壓為4-6V的交流電源上。