预算表的计算、价差表的计算、费用表的建表计算应键入以下哪一组合键()
A、Alt+P
B、Alt+1
C、Alt+2
D、ShiFt+0
参考答案：B
There are some health problems that , when _______ in time , can become bigger ones later on.
A．not treated
B．not having treated
C．not to be treated
D．not having been treated
压制万头的弯曲半径分哪几种？（）
A.等于公称直径
B.公称直径的1.5倍
C.公称直径的2倍
