水冷段导管有哪几种规格（）。
A.24
B.26
C.28
D.30
E.32
参考答案：A, C
–What do you mean ______ saying “He is over weight”？
--- I mean that he is too fat ______ his age.
A．to; for
B．by; for
C．about; with
D．by; about
按有计划绿证行车时：列车在改用绿色许可证发车站进站前或站内速度低于（）km/h，弹出窗口输入绿色许可证编号并确认。
A.30
B.45
C.60
