关于赤道的叙述，不正确的是（） A．赤道周长50000千米

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问题选择题

关于赤道的叙述，不正确的是（　　）

A．赤道周长50000千米

B．赤道是地球仪上最长的一条纬线

C．赤道把地球分为南北半球

D．赤道的纬度为0°

答案

赤道是最大的纬线圈，约4万千米；赤道把地球平分为南、北两个半球；赤道的纬度为0°．根据题意．

故选：A．

阅读理解

任务型阅读，读下面的文章，并在后面的横线上填上相应的答案，使句意符合短文意见。

What color are their sweaters(毛衣)?

Kate, Jim, Rose and Bill put their sweaters on the table. The sweaters are white, blue, red and

black, We know, the boy's sweaters aren't red and the girls' sweaters aren't black. What color is

Kate's sweater? I don't know. But I know it is not blue. Bill says, "My sweater is white." Then what

color are their sweaters?

1. Kate's sweater is ___________

2. Jim's sweater is ___________

3. Rose's sweater is ___________

4. Bill's sweater is ___________

单项选择题

往复泵若不考虑泄漏损失，则它的理论流量随排出压力的增加而（）。

A.增加

B.减少

C.不变化

C.都不正确