波浪玫瑰图表达了以下有关波浪性质的信息（）。 A.某时段波浪的

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问题多项选择题

波浪玫瑰图表达了以下有关波浪性质的信息（）。

A.某时段波浪的波高

B.各不同方向波高出现的情况

C.某方向某波高波浪出现的频率

D.某方向某波高波浪持续的时间

E.某方向一定出现频率下的波长

答案

参考答案：B, C

填空题

看图填空。

Jack was woken up l the shouting " Fire ! Help! Fire! Help!. . . " What had 2 ? He 3 out of the window. Wow!

He found that his neighbor's 4 was on fire. Jack jumped off the bed and rushed to the telephone. He made a 5 to the

police. 6 , he ran out and 7 his neighbor (to) fight 8 the fire. Soon the fire-fighters came and in a short time the fire

was put 9 . And the house owner 10 Jack and fire-fighters a lot.

1. 2. 3. 4. 5.

6. 7. 8. 9. 10.

填空题

危机管理中的一个关键问题，就是要选择合适的（）。