就显效和维持时间而言,拮抗肌松药的最佳组合是()
A.依酚氯铵和胃长宁
B.依酚氯铵和阿托品
C.新斯的明和阿托品
D.吡啶斯的明和阿托品
E.以上均否
参考答案:B
--- When did you borrow the English book?
--- I borrowed it last week. I _________ it for a week.
A.borrowed
B.have borrowed
C.have had
D.have lent
目前我国工业生产中最严重的职业危害之一是()
A.材料
B.蒸汽
C.气体
D.尘肺