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26.     Smiths went to Shenzhen Sports Center to play     golf.

      A.The, /    B. A, the     C. The, the     D. A, a

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                School zoo trip
      Time
    Activity
At 9:00 am
___21.____school
At   22.  
Arrived at the zoo
At 10:00 am
___23.___ the elephant show
At ___24.___
Left the zoo
At 2:30 pm
___25.___ back to school

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(  )16.________ is a new sport today..

A.Swimming          B. Skin-diving          C. Skating

(  )17.Because you _______ , you climb big rocks under water easily..

A.are too heavy.  B. have no weight at all  C. are not as heavy as on the land

(  )18.Everything under the water is________ .

A.blue and green      B.red and blue    C. black and white

(  )19. With a tank of air on your back, you can________.

A.catch a lot of fish very easily.      B. stay under water for a long time  

C. climb big rocks.

(  )20.You can get________ from the deep sea.

A.nothing          B. a lot of gold        C. a lot of things.

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听第一段对话回答第6小题。

(  )6.What does the woman want to do?

A. To buy clothes       B. To see a film         C. To swim

听第二段对话回答第7小题。

(  )7.What time will the plane arrive in Beijing?

A.At 7:30          B. At 8:40        C.At 9:30

听第三段对话回答第8小题。

(  )8.When was Kim leaving?

A.At 8:15 p.m on Monday, June 20.       B. At 9:15 a.m.on Monday, July 20

C.At 10:10 p.m. on Sunday, June 20

听第四段对话回答第9小题。

(  )9.What does the man want to do?

A.To buy a book.  B.To book a room  C.To buy a new room from the Rose Hotel.

听第五段对话回答第10小题。

(  )10.What do you know from the dialogue?

A.The man has never seen Mount Emei.   

B. The man has visited Mount Emei.      

C. The man is going to Mount Emei.

听第六段对话回答第11-12小题。

(  )11.Who is the girl looking for?

A.Her classmate.        B. Her teacher    C. Her mother

(  )12.What color is the hat?

A.Blue           B. White        C. Blue and white

听第七段对话回答第13-15小题。

(  )13.How many books has the man borrowed?

A.Four            B. Three         C. Seven.

(  )14.Why can’t the man take the books out?

A.Because he has no card     

B. Because he hasn’t returned his books   

C.Because the books are new.

(  )15.Which of the following is WRONG?

A.The man can’t read the new books. 

B. The man should not take out the books. 

C. The man may come to read the books the next day.

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23、经研究发现,小球在离地面1000m 的高空从静止开始自由下落,其下落的距离h随时间t的变化规律如图17所示(顶点在坐标原点、对称轴为h轴、h关于t的二次函数图象)。根据图中信息和规律,请在下表的①②处对应时刻填上小球下落的距离。 .           

时刻/S
0
1
2
3
*****
6
距离/m
0

20
45
*****

①    ______________,  ②  ______________

2009-2010学年度上学期

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22、图16是小亮测定斜面机械效率的装置图。每次实验时,被拉的小车沿同一斜面匀速向上运动。下表是小亮设计的记录数据的表格.

斜面倾斜程度
小车重G/N
小车上升高度h/m
沿斜面拉力F/N
小车移动距离S/m
有用功W/J
总功W/J
机械效率h
较缓
10
0.1
3
1
1
3
33%
较陡
10
0.2
4
1
 
 
 
最陡
10
0.4
6
1
4
6
67%

 (1)“较陡”时,做的有用功为_________,总功为_________,额外功为___。

(2)分析表格中的实验数据,你能得到哪些结论?(要求写两条)

a.______________________________________________________________________;

b.______________________________________________________________________.

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21、汽车是常见的交通工具,它应用了很多方面的物理知识和技术,他在给我们带来交通方便的同时,也给我们带了环境污染、交通等一些社会问题。请你运用所学的物理知识简单回答下列问题:

  (1)汽车发动机的冷却剂常用水的主要原因是                   

  (2)载重汽车一般安装较多车轮,其目的是                     :

(3) 为了预防交通安全事故,人们常采取的有效措施有:

①_________________________________,  ②_________________________________.

  (4)汽车水箱里装有15kg的水,温度由20℃升高到40℃吸收的热量是_____________ J。

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20、某人用如图15所示的滑轮组吊起一个重1000N的物体,滑轮组的机械效率为80%,他在5s内使绳子自由端移动8m。求:

(1)物体上升的高度和平均速度?

(2)人的拉力是多少?

(3)拉力的功率为多大?

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19、如图14所示圆台形玻璃容器放置在水平桌面,开口处直径为10cm,底面直径为6cm,总高度为15cm,内装290克水,水面高为7.5cm,现向杯中投入一质量为29克的木块,木块漂浮在水面时,水面上升了0.5cm,求:(不计杯重和杯壁厚度)

(1)木块所受到的浮力是多少?

  (2)这时杯底的压力增加了多少?

  (3)杯底对桌面的压强增加了多少?

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18、(6分)某实验小组在测滑轮组机械效率的实验中得到的数据如表所示,实验装置如图13所示:

(1)实验中还需要使用的测量工具是_______、_________.

(2)计算出实验2的机械效率是_______;通过表中数据可分析出实验1是用图______做的实验,实验2是用图    做的实验。  

   (3)通过实验1和实验2的数据分析可得出结论:使用不同的

滑轮组,提升相同的重物时,动滑轮的个数越多,滑轮组的机械效率越    

实验次数
物体的重量G(N)
钩码上升高度h(m)
绳端拉力F(N)
绳端移动距离S(m)
机械效率η
1
4
0.1
1.8
0.3
74%
2
4
0.1
1.5
0.4
 
3
6
0.1
2.4
0.3
83%

   (4)比较实验1和实验3可得正确结论:使用同一滑轮组,         ,可以提高滑轮组的机械效率。 

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