My parents are always strict ____ me.[ ]
A. with
B. in
C. on
D. at
答案:A
明沟排水坡度为0.3%~0.5%,特殊困难地段可为( )。
A.0.1% B.0.15%C.0.2% D.0.6%
一个量程350bar的压力变送器输出电流12mA时的压力是多少?