A.surface fatigue
B.fretting corrosion
C.heavy overloading
D.gear misalignment
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A.doing
B.make
C.turn
D.operating
A.why
B.which
C.in which
D.on which
A.until
B.not until
C.not before
D.not after
A.Heat is always transferred at a constant rate
B.Heat transfer rate increases as temperature difference increases
C.The rate of heat transfer is not affected by temperature difference
D.The high temperature region is known as a heat sink
Which of the following operations must be entered on the Oil Record Book Part Ⅰ? （）
Ⅰ.Routine discharge at sea of bilge water containing oil from the machinery spaces
Ⅱ.Bunkering of fuel oil
A.Ⅰ only
B.Ⅱ only
C.both Ⅰ and Ⅱ
D.neither Ⅰ nor Ⅱ
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（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.