题目内容

14. ____ a reply, he decided to write again.

A. Not receiving
B. Receiving not
C. Not having received
D. Having not received

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15. The visiting Minister expressed his satisfaction with the talks, ____ that he had enjoyed his stay here.

A. having added
B. to add
C. adding
D. added

气旋和反气旋的强度一般用（）来表示。

A. 中心气压值
B. 闭合等压线的根数
C. 降水的强度
D. 旋转程度

气旋按热力结构分为（）。

A. 热带气旋
B. 温带气旋
C. 锋面气旋和无锋面气旋
D. 极地气旋

气旋是占有三度空间的，在同一高度上中心气压_于四周的流场中的涡旋，涡旋中的空气在北半球_旋转。