题目内容

According to the customs of this port，the work of opening and closing hatch covers is done

A. the ship's officers
B. the foreman from the shore
C. the ship's hands
D. the tally man

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成书于唐代的本草著作有:
A .《新修本草》
B .《开宝本草》
C .《证类本草》
D .《本草图经》
E .《本草拾遗》

团休评估是一种工作方法和研究方法，是对团体的一次干预过程。()

In the event of any quarantinable disease breaking out during its currency，the certificate

A. becomes null and void
B. remains effective
C. is to be extended
D. is to renewed

黑色星期五简称黑五，是美国感恩节周末的传统的购物日。()