加氢岗位催化剂浓度太高时，应（）催化剂泵的冲程。
A、减少
B、不变
C、增大
D、停止
参考答案：A
We should use sides of paper to reduce the waste.
A. all B. both C. neither
On a long ocean tow，the bridle should be made up of two equal lengths of（）.
A.chain
B.wire
C.nylon
D.manila
