气旋是大气中水平气流旋转而形成的大型涡旋，气旋中，天气常发生

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问题单项选择题

气旋是大气中水平气流旋转而形成的大型涡旋，气旋中，天气常发生剧烈的变化。北半球气旋的旋转方向（）。

A.逆时针旋转

B.顺时针旋转

C.视气压情况而定

D.随机旋转

答案

参考答案：A

阅读理解

阅读短文，判断正(T)误(F)。

It was Sunday yesterday. The weather was fine. Jim and Tom went to the zoo by bike. They saw lots

of animals there. They were very happy. At eleven o'clock, they were hungry and thirsty. So they bought

some hot dogs and some milk. They had them for lunch. Then they played in the zoo. They jumped and

ran. They had a good time.

( ) 1. The weather was fine yesterday.

( ) 2. They went to the park by bike.

( ) 3. They saw lots of animals.

( ) 4. They had some bread and milk for lunch.

( ) 5. They had a good time.

单项选择题

搜集、整编与分析气象、水文、泥沙等资料，提出水文、泥沙参数和成果，是（）阶段的主要内容之一。

A.项目建议书

B.预可行性研究

C.可行性研究

D.初步设计