题目内容

【题目】踩影子游戏(比赛谁先踩到对方的影子)你玩过吗?某天,烟台的小明和同学在室外玩踩影子游戏。据此回答下面小题。

1仅从影子长短考虑,下列时间中最容易被对方踩到影子的是( )

A.上午8:00B.上午10:00C.中午12:00D.午后14:00

2一天中身影长短变化现象与( )

A.地球公转有关B.地球自转有关C.四季更替有关D.二十四节气有关

【答案】

1A

2B

【解析】

太阳光线的直射点有规律的在南北回归线之间来回移动,各地正午太阳高度也随之发生有规律的变化。太阳高度是指太阳光线与水平面的夹角,太阳光线垂直照射的地方,太阳高度最大,太阳辐射最强。

1由于地球的自转,一天中,早晨晚上太阳高度小,影子长;中午太阳高度大,影子短。仅从影子长短考虑,最容易被对方踩到影子的是上午8:00,此时影子长;故选:A。

2由于地球的自转,产生了太阳的东升西落,从而造成影长在一天中的变化。故选:B。

本题考查了地球自转的产生的地理现象,属基础题。

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【题目】Some inventions are very important.For example,the telephone allows people to communicate all over the world.The ____ lets people travel long distances in a short time.Life is much easier with these ____ inventions.

Some inventions are just fun.A company in a foreign country has invented ____ flowers.You can listen to music that comes through real flowers.Customers in restaurants can smell the beautiful roses_____ listen to pleasant music while eating.People in the dentist’s office can look at pretty lilies and listen to Mozart while having their______examined!

There is now a vehicle that gets you around with almost no effort ____ .In fact,you drive this invention while standing on it.This vehicle runs by electricity.It ____quite easily.When you lean forward,it moves forward,and when you lean ____ ,it moves backward.

A new kind of bubble liquid has been invented.If you blow bubbles ____ this liquid,they can last for several minutes. ____ are very strong.You can even pick them up and throw them around.

Do you have your own ideas about inventions now?

1A. bike B. bus C. ship D. plane

2A. important B. useless C. boring D. strange

3A. dancing B. talking C. singing D. walking

4A. but B. so C. nor D. and

5A. ears B. eyes C. teeth D. nose

6A. in all B. at all C. after all D. for all

7A. carries B. makes C. works D. plays

8A. forward B. backward C. towards D. afterwards

9A. about B. at C. with D. for

10A. They B. We C. You D. None

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