能显著降低餐后血糖的降糖药是（）。
A.氯磺丙脲
B.罗格列酮
C.甲苯磺丁脲
D.二甲双胍
E.阿卡波糖
参考答案：E
硫磺回收装置停产时，首先要进行的步骤是（）。
A、酸气除硫
B、惰性气体吹扫置换
C、装置冷却
D、切断酸气
What happened to businesses after the mass move
A．They established branches in suburbs.
B．They scattered here and there in cities.
C．Some bigger companies moved out.
D．They lost many employees.
