对肾脏毒性较大的药物为( )。
A.头孢噻啶B.头孢孟多C.氨曲南D.亚胺培南E.克拉维酸
参考答案:A
解析:[知识点] 头孢菌素类的药理机制
My father _______ to Shanghai. He _______ for over 2 months. [ ]
A. has been, has left
B. has gone, has gone
C. has gone, has been away
D. has been, has gone
掘进机内喷雾压力不得低于(),外喷雾压力不得小于()。
A.3MP、1.5MP
B.2.5MP、1.5MP
C.3MP、2.5MP