A.are interdependent
B.are not interdependent
C.have nothing to do with each other
D.are independent
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A.has kept pace with
B.has kept pace to
C.has made pace with
D.has made pace to
A.The high；the large
B.The higher；the larger
C.The lower；the larger
D.The low ；the large
A.When receiving by
B.When received by
C.In order to receiving
D.In order to receive
A.to give off；which
B.giving off；which
C.to give off；that
D.giving off；that
A.cylinder liner
B.cylinder cover
C.piston
D.exhaust valve
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