A.be affected
B.affect
C.be effected
D.effect
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A.look for
B.find out
C.consult
D.read
A.join with
B.mix
C.be equal to
D.be constant
A.the bottom of the column；the cylinder blocks
B.the top of the column；the cylinder heads
C.the top of the column；the cylinder blocks
D.the bottom of the column；the cylinder heads
A.the inlet valve
B.the outlet valve
C.both the inlet valve and the outlet valve
D.the pump inlet valve
A.8-10℃
B.10-12℃
C.10-15℃
D.10-20℃
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