單項(xiàng)選擇題Let H () the quantity of heat which has been converted into mechanical work.

A.represent
B.represents
C.representing
D.being represented


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2.單項(xiàng)選擇題After he () the test, the engineer put down the results.

A.has finished
B.finishes
C.had finished
D.would finish

3.單項(xiàng)選擇題Now that the valve is not worth (), I suggest it ().

A.to repair;to renew
B.repairing;be renewed
C.repairing;will be renewed
D.to repair;to be renewed

4.單項(xiàng)選擇題() to damage the protective coating on the inner side of the shell.

A.Care to be not taken
B.Care not to be taken
C.Care to be taken not
D.Not care to be taken

5.單項(xiàng)選擇題The following engine parts are found damaged and we are about to () compensation from the shipyard.

A.claim to
B.claiming to
C.claim for
D.claiming for