单项选择题
A.to send B.to be sent C.for being sent D.being to send
It is well known that the whole power distribution of t...
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
How do you treat someone suffering from electrical shoc...
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
Tools with （）handles should be used to check electric c...
单项选择题Tools with （）handles should be used to check electric circuit.
A.plastic B.metal C.stainless steel D.copper
