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透析中发生恶心、呕吐的常见原因有哪些?

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The tallying of cargo refers to such kind of work that the amount and condition of all cargo should be checked().

A. after its arrival at the destination
B. during the ship's voyage at sea
C. before they come to the dock
D. during the time when the loading or diacharging is going o

雨滴由静止开始下落,遇到水平方向吹来的风,当风速越大(不考虑空气阻力),则()

A. 雨滴下落时间越长
B. 雨滴下落时间越短
C. 雨滴着地时速度越大
D. 雨滴着地时速度越小

行政机关实施行政许可可以收费,但是,法律、行政法规规定不能收费的,依照其规定。

A. 正确
B. 错误

在正、到发线上,允许速度≤120km/h的线路,冻害整修作业中冻害顺破长度是片样规定的?

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