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18. The athlete hurt his foot in the race. __________, he missed the gold medal.

A. Accurately          B. Fortunately        C. Possibly          D. Consequently

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17. Not until he saw his mother lying in bed, dying , _________ how much he loved her.

A. he realized          B. did he realize      C. he had realized      D. had he realized

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16. The theme song sung on the Beijing Olympic Games __________ the people all over the world.

A. appeals to          B. devotes to          C. contributes to      D. applies to

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从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并标在试卷的相应位置。

15. Fifteen students from ________ university jumped into the Baota River and formed ________ “human chain” to save two drowning boys.

A. the; the            B. a; a              C. an ; the           D. the; /

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第二节(共9小题;每小题1分,满分9分)

听第六段材料,回答第6–8题。

6. Why did the woman go to New York?

A. To find a new job.

B. To look after her sister.

C. To spend some time with her nephew.

7. How old was the baby when the woman left New York?

A. Two months.               B. Five months.           C. Seven months.

8. What did the woman like doing most with the baby?

A. Holding him.        B. Playing with him.       C. Feeding him.

听第7段材料,回答第9–11题。

9. What are the speakers talking about?

A. A problem with traffic rules.

B. A way to improve air quality.

C. A suggestion for city planning.

10. What does the man suggest?

A. Limiting the use of cars.

B. Encouraging people to walk.

C. Warning drivers of air pollution.

11. What does the woman think of the man’s idea?

A. It’s interesting.              B. It’s impractical.             C. It’s worth trying.

听第8段材料,回答第12–14题。

12. How long will the man probably stay in New Zealand?

A. One week.                  B. Two weeks.                   C. Three weeks.

13. What will the man do after the woman’s advice?

A. Save more money for his trip.

B. Book his flight as soon as possible.

C. Go to New Zealand after Christmas.

14. What can we learn about flights to New Zealand at Christmas time?

A. They are on special offer.

B. They are free of charge.

C. They can be twice as expensive.

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第一节  (共5小题;每小题1分,满分5分)

1. What is the weather like?

A. It’s raining.            B. It’s cloudy.            C. It’s sunny.

2. Who will go to China next month?

A. Lucy.                 B. Alice.                C. Richard.

3. What are the speakers talking about?

A. The man’s sister.        B. A film.               C. An actor.

4. In which room will the speakers meet?

A. Room 340.             B. Room 314.            C. Room 223.

5. Where does the conversation most probably take place?

A. In a restaurant.          B. In an office.           C. At home.

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17.(15分)如图所示,某货场将质量为m1=100 kg的货物(可视为质点)从高处运送至地面,为避免货物与地面发生撞击,现利用固定于地面的光滑四分之一圆轨道,使货物由轨道顶端无初速滑下,轨道半径R=1.8 m。地面上紧靠轨道依次排放两块完全相同的木板A、B,长度均为=2m,质量均为m2=100 kg,木板上表面与轨道末端相切。货物与木板间的动摩擦因数为1,木板与地面间的动摩擦因数2=0.2。(最大静摩擦力与滑动摩擦力大小相等,取g=10 m/s2)求:

(1)求货物到达圆轨道末端时对轨道的压力。(2)若货物滑上木板A时,木板不动,而滑上木板B时,木板B开始滑动,求应满足的条件。(3)若1=0.5,求货物滑到木板A末端时的速度和在木板A上运动的时间。

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16、(15分)如图所示的坐标系,x轴沿水平方向,y轴沿竖直方向。在x轴上方空间的第一、第二象限内,既无电场也无磁场;在第三象限,存在沿y轴正方向的匀强电场和垂直xy平面(纸面)向里的匀强磁场。一质量为m、电荷量为q的带电质点,从y轴上y = h处的P1点以一定的水平初速度沿x轴负方向进入第二象限。然后经过

x轴上x =–2h处的P2点进入第三象限,带电质点恰好能做匀速圆周运动。之后经过y轴上y =–2h处的P3点进入第四象限。已知重力加速度为g。求:(1)质点到达P2点时速度的大小和方向;(2)第三象限空间中电场强度和磁感应强度的大小;

(3)若在第四象限加一匀强电场,使质点做直线运动,求此电场强度的最小值。

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15.(10分)(选修3-3)如图所示,气缸放置在水平台上,活塞质量为5kg,厚度不计,由活塞产生的压强为0.2×105pa,气缸全长25cm,大气压强为1×105pa,当温度为27℃时,活塞封闭的气柱长10cm,若保持封闭气体温度不变,将气缸缓慢竖起倒置.

(1)求气缸倒置后封闭气柱的长度?

(2)气缸倒置后,使封闭气体温度升至多少K时,活塞刚好接触平台(活塞摩擦不计)?

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14.(8分)某课题小组通过实验测量黄河水的电阻率.现备有一根均匀的长玻璃管(两端各有一个圆形电极,可装入样品水,接触电阻不计)、电压表(量程12V,内阻约l00KΩ),电流表(量程100μA,阻约50Ω)、滑动变阻器(10Ω,1A)、电池组(电动势E=12V,内阻不计)、开关、导线若干、直尺、待测的水样品。

 如图a是他们用伏安法多次测量并计算出对应的水柱长度L与柱电阻R描点画出的图象;实验中还用10分度的游标卡尺测量了玻璃管的内径,结果如图b所示.

请回答下面的问题:

(1)玻璃管内径d的测量值为____________cm;

(2)请在虚线框内画出测量水柱电阻的电路图;

(3)所测水的电阻率为___________________Ω·m(保留两位有效数字)

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