根据ISM规则有关规定,船长命令属于()。
A.受控的外来文件
B.受控的公司文件
C.非受控文件
D.以上都不准确
参考答案:B
With his good sense of direction, he _____ quickly and easily get round in the new city.
A.can
B.must
C.should
D.need
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