动力驱动的非自动门，由使用人员通过连续揿压按钮或类似方法进行

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问题单项选择题

动力驱动的非自动门，由使用人员通过连续揿压按钮或类似方法进行关门时，最快门扇平均关闭速度应不大于（）m/s。

A、0.3

B、0.4

C.05

D、0.6

答案

参考答案：A

单项选择题

男，26岁。饱餐后剧烈活动时腹痛2h，持续性痛阵发性加剧，脐周伴腰背痛，呕吐频繁，吐后症状无缓解。腹肌紧张，脐固有压痛及反跳痛，肠鸣音亢进，有气过水声。

该病人需要首选静脉输入

A．血浆

B．代血浆

C．全血

D．等渗糖盐水

E．复方氨基酸

单项选择题

Man: Have you any idea what Jack Johnson’s doing these days
Woman: Do you know, I’ve lost track of him.
Question: What does the woman mean().

A. She has no idea where Jack is.

B. She last saw Jack at the race track.

C. She’s been trying to track Jack.

D. Jack was lately seen driving a truck.