紧急避孕药可以有效地预防意外妊娠,是可靠的避孕方法。
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临近装置发生火灾爆炸事故时,本装置应()。
A. 降量生产
B. 装置马上紧急停车
C. 发现对装置安全生产造成威胁时紧急停车
D. 保持原来处理量生产
每季度、每半年和年终应对各种药具进行全面盘点。
A. 正确
B. 错误
In the Northern Hemisphere a wind is said to veer when the wind().
A. Changes direction clockwise,as from north to east,etc
B. Changes direction violently and erratically
C. Remains constant in direction and speed
D. Changes direction counterclockwise,as from south to east,etc