服用氯丙嗪导致低血压时什么药禁用（）
A.去甲肾上腺素
B.肾上腺素
C.间羟安
D.低分子右旋糖苷
E.活血作用的中成药
参考答案：B
— Many people have been out of work in China.
— And _________that the government is always takingmeasures to increase the number of
employment. [ ]
A.in spite of
B. because of
C. thanks to
D. in addition to
将定位后的零件固定，使其在加工过程中保持位置不变的过程叫（）。
