脉冲压力指指脉冲阀工作前与脉冲阀连通的气包所设定的压缩空气压力,一般设定为()。
参考答案:0.25~0.3MPa
The policeman’s ________ traffic directions made all the drivers quite _________.
A.confused; confused
B.confusing; confusing
C.confused; confusing
D.confusing; confused
The box is ________ heavy ________ I can’t lift it.
A.too, to
B.very, that
C.so, that
D.too, that