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
