CFM56-5B发动机余油口漏燃油的最低放行标准为（）
A.30滴/分钟
B.60滴/分钟
C.90滴/分钟
D.120滴/分钟
参考答案：C
— _____________ your father?
— He's a teacher. [ ]
A. Who's
B. What's
C. What
The old lady had two clever sons, ____ did a good job in the 2010 National College Entrance Exam, though.
A．none of them
B．both of whom
C．none of whom
D．neither of whom
