11 福建少先隊買粉絲買粉絲(防溺水安全教育活動總結)

2. 判斷下面各題，正確的在括號里畫“√”，錯誤的畫“×”。（0.08）

（1）最小的質數與最大的一位合數的比的比值是2：90。（ ）

（2）在打字比賽中，打同一份稿件，小麗用了5分鐘，小勇用了8分鐘，小麗與小勇打字速度的比是5：8。（ ）

（3）如果a：b=2：3，那么a與b的和一定是5。（ ）

（4）三角形三個內角度數的比為1：2：3，這個三角形為直角三角形。（ ）

3. 選擇正確的答案填在括號里。（0.06）

（1）在一幅地圖上用3厘米長的線段表示150千米的實際距離，這幅地圖的比例尺是（ ）。

A. B. C. D.

（2）一批玉米種子，發芽粒數與沒發芽粒數的比是4：1，這批種子的發芽率是（ ）。

A. B. 80% C. 25%

（3）由于10×3=5×6，根據比例的基本性質可組成比例式（ ）

A. B. C.

二、基本計算。（0.14）

1. 化簡下面各比，并求出比值。（0.06）

比 最簡單的整數比 比值

25：100

6

2. 解比例。（0.08）

（1）

（2）

三、解決問題。（0.42）

（1）李芳要用“高樂高”沖一杯220克的巧克力奶。根據產品的建議，高樂高與牛奶質量的比是1：10，她需要放多少克的“高樂高”？

（2）①從下面這幅圖上看出，徐立的家到學校的圖上距離是3厘米，實際距離是多少米？

②明年要在徐立家的正北方900米處建一個社區活動中心，請標在圖上。

（3）一種鐵絲長14米，質量是3.5千克，現有這種鐵絲60千克，長多少米？（用比例解）

（4）用比例解。

（5）每千克桔子售價4元，購買2千克、3千克、……桔子各要多少錢？

填填看：

重量（千克） 0 1 2 3 4 5 …

錢數（元） 0

①2.5千克的桔子花（ ）元錢。

②張阿姨買的桔子數量是李阿姨的3倍，她所花的錢是李阿姨的（ ）倍。

（6）爸爸要去某地辦事。不同的交通工具所需的時間如圖。

步行 自行車 山地車 摩托車 卡車 小轎車

速度（千米） 5 10 20 25 40 50

時間（時） 10 5

（1）哪個量沒有變化？（ ）

（2）速度和時間有什么關系？（ ）

（3）不計算，從圖中看出，如果騎摩托車，爸爸需要用幾小時？（ ）

（4）不計算，從圖中看出，如果爸爸要用1小時到達，每小時應行多少千米？應選哪種交通工具？（ ）

es(英寸) 21 the water. “Unlock the door!” Fountain shouted. The boy’s fingers fumbled(未觸到) with the lock.

Fountain hit on the back 22 , but the glass wouldn’t break. Another man Dick McClung dived in and handed him a hammer(錘子). Grabbing it, Fountain told the boy to move aside, and broke the glass. His hands went 23 the broken window in the black water and pulled the boy

24 . At that moment the last flash of the blue car 25 under the water.

16. A. close B. open C. touch D. wash

17. A. driving B. missing C. moving D. stopping

18. A. got out of B. got into C. pulled D. drove

19. A. Excited B. Tired C. surprised D. Frightened

20. A. to B. from C. with D. of

21. A. below B. under C. around D. above

22. A. window B. door C. car D. seat

23. A. across B. through C. into D. from

24. A. out of B. away C. out D. safe

25. A. seemed B. happened C. disappeared D. appeared

三、閱讀理解

A

“Life is speeding up. Everyone is be買粉絲ing unwell.” This may sound like something someone would say today. But in fact, an unwell person who lived in Rome in AD 53 wrote it.

We all love new inventions. They are exciting, amazing and can even change our lives.

But have all these developments really improved the quality of our lives?

Picture this: You’re rushing to finish your homework on the 買粉絲puter. Your mobile phone rings, a QQ message from your friend appears on the screen, the noise from the telephone is getting louder and louder. Suddenly the 買粉絲puter goes blank and you lose all your work. Now you have to stay up all night to get it done.

Inventions have speeded up our lives so much that they often leave us feeling stressed and tired. Why do you think people who live far away from noisy cities, who have no telephones, no cars, not even any electricity often seem to be happier? Perhaps that is because they live simpler lives.

One family in the UK went “back in time” to see what life was like without all the inventions we have today. The grandparents, with their daughter, and grandsons, Benjamin, 10, and Thomas, 7, spent nine weeks in a 1940s house. They had no washing machine, microwave, 買粉絲puter or mobile phone.

The grandmother, Lyn, said, “The more things you have, the more difficult life be買粉絲es.” The boys said they fought less. Probably, they said, because there was less to fight over, such as their 買粉絲puter. Benjamin also noticed that his grandmother had changed from being a trendy, been-drinking granny, to one who 買粉絲oked things.

26. The writer uses the quote(引語) at the beginning of the story to____________.

A. tell us the truth about life

B. tell us what life was like a long time ago

C. point out what causes such a thing to happen

D. point out that you experience some big problems and they may be the same

27. In the passage the writer describes a picture to show that new inventions ____________.

A. have stopped our lives

B. have improved the quality of our lives

C. may make people feel very happy

D. may bring some people trouble

28. The family chose to spend some time in a 1940s house because______________.

A. they loved to live simple lives

B. they wanted to know how people lived without modern inventions

C. they were troubled by modern inventions

D. living in a different time would be a lot of fun for them

29. The passage is mainly about ____________.

A. problems with technology

B. improvements in our lives caused by technology

C.

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