在同一个机械密封中,各弹簧的自由高度差应小于(),且不得有歪斜现象。
A.0.05mm
B.5mm
C.0.5mm
参考答案:C
Some people always take seriously the ______ of the complete globe end in the near future.
A.celebration
B.production
C.prediction
D.permission
4532×79÷158的值是( )。
A.2266
B.2166
C.2366
D.2362