单项选择题
We prefer all the spare parts （） on board before departure.
A.to send
B.to be sent
C.for being sent
D.being to send
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相关考题
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单项选择题
It is well known that the whole power distribution of the ship’s electrical services mainly depend on the（）.
A.sub-boards
B.main switchboards
C.emergency switchboards
D.distribution boards -
单项选择题
How do you treat someone suffering from electrical shock after you secure the source?（）
A.check for respiration
B.check for pulse
C.treat for shock
D.All of the above -
单项选择题
Tools with （）handles should be used to check electric circuit.
A.plastic
B.metal
C.stainless steel
D.copper
