【題目】讀地球的半徑和赤道周長圖，回答下列問題．
（1）圖中A所代表的地理事物的名稱是 半徑，B代表的地理事物的名稱是 半徑；A （大于、小于）B，因此，地球是一個 的球體．
（2）C所代表的地理事物的名稱是 ，長約 千米．
（3）地球的平均半徑長約 千米，地球表面積約 平方千米
科目：初中地理 來源： 題型：
【題目】
Haze (霧霾) 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 (減少) 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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科目：初中地理 來源： 題型：
【題目】讀“陸半球地圖”，回答問題。
(1)A大洲居民以________人種為主。
(2)從發展水平看，B大洲大多為____________國家。
(3)七大洲中，“陸半球地圖”沒有顯示的大洲有大洋洲和_________。
(4)簡述C大洲地勢與河流的關系_________。
(5)在某次軍事演練活動中，彼得船長駕船從D點依次向正北、正東、正南、正西各行駛了500千米后，發現只能回到D點的正東面。請用地理知識向彼得船長解釋不能回到D點的原因：______。
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