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【简答题】
把一根导线对折后使用，它的电阻是原来的______倍；若把它均匀拉长为原来的2倍，则电阻变为原来的______倍。
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皮皮学刷刷变学霸
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【单选题】When the machinery spaces are in the periodic unmanned condition, ____ shall be immediately available and on call to attend the machinery space
A.
the chief engineer
B.
the designated engineer from shipyard
C.
the designated duty officer in charge of the engineering watch
D.
the designated surveyor from classification society
【单选题】Were anything to happen, I ______ immediatel y.
A.
return
B.
returned
C.
didn ’ t return
D.
would return
【单选题】Mr. Green ______ goes to the park for a walk with some friends after supper.
A.
frequently
B.
immediately
C.
finally
D.
completely
【单选题】These natural disasters have warned us that everyone should start to protect the_________ immediately.
A.
amusement
B.
development
C.
environment
D.
government
【单选题】If a crew member is exposed to phenol by way of skin or eye contact, you should IMMEDIATELY ______.
A.
administer oxygen
B.
treat victim for shock
C.
flush skin and eyes with water
D.
give victim stimulant
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