在岩石抗压强度试验中,若加荷速率增大,则岩石的抗压强度()。
A.增大
B.减小
C.不变
D.无法判断
参考答案:A
— Hello, may I speak to Millie, please? — .
A.who are you?
B.I’m sorry.
C.Who speaking?
D.This is Millie.
机械密封摩擦小,功率损耗小,轴和轴套易受磨损。