相关考题
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单项选择题
I shall keep the﹙保安巡逻)（） .
A. coast patrol
B. inshore patrol
C. patrol service
D. security patrol -
单项选择题
Where are（危险货）（）carried on board?
A. dangerous goods
B. safe goods
C. A or B
D.A+B -
单项选择题
It shows mourning when you lower（）(半旗).
A. half-mast
B. dip the mast
C. flag line
D. flag mast
