题目内容

【题目】读图,回答问题.

(1).图中本初子午线是(  )
A.A线
B.B线
C.C线
D.D线
(2).图中构成东西半球分界线的两条经线是(  )
A.A线和C线
B.A线和D线
C.B线和C线
D.B线和D线
(3).从图中观察,世界陆地主要集中在(  )
A.北半球、东半球
B.北半球、西半球
C.南半球、东半球
D.南半球、西半球

【答案】
(1)B
(2)A
(3)A
【解析】(1)本初子午线是0°经线,图中的B线是0°经线.故选:B.(2)国际上习惯用西经20°(写作20°W)和东经160°(写作160°E)这两条经线组成的经线圈,作为划分东西半球的界线.读图可知,A为西经20°,B为0°经线,C为东经160°,D为180°经线.故选:A.(3)根据人们的计算,地球上陆地面积占29%,海洋面积71%.读图可知,陆地集中于北半球、东半球;海洋集中于南半球、西半球.北极地区为海洋,南极地区为陆地.故选:A.

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Haze (雾霾) has become a common word in recent years. It is a kind of air pollution caused by human beings. More and more cars are on the road, and more and more factories are built everywhere, so the pollutant is gave off that do harm to people's life and health, Besides, haze will make the traffic heavier and accidents easy to happen, because drivers can't see the road clearly in the haze.Thirdly, if someone inhales (吸入) much haze, he has greater possibility to get cancer.

In order to protect ourselves and environment, we should take action at once instead of waiting for help. There are some tips for you:

Wear a mask(口罩): this is an efficient way to prevent you from inhaling the haze. But pay attention to buy the masks that arestandard (合格的) and as suitable as the size of your face. And after using, fold the masks, put away when they are dry, and don't wash them.

Don't go outside as possible as you can: in the haze, you should reduce (减少) the time on which you spend doing morning exercise. For workers, don't ride to offices but take a bus. And when going inside, you should drink much water.

The way to clean is very' simple: use the warm water to wash your face, mouth and nasal cavity(鼻腔). This can help you to wash ont the pollutant.

Don't keep windows open for a long time: if the haze is more and more serious, don't open the windows. If you want to, please avoid the peak(最高峰) of haze.

All people want to live in a healthy way, so do everything that we can do in our best.

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