因轴向力不平衡,轴向窜量大导致轴承发热或冒烟时的解决方法是()
A、调整润滑油量或滤油、换油
B、更换或修复轴承
C、检查平衡盘,进行调整或更换
D、调整进泵压力
参考答案:C
We hadn't realized that there would be a power cut so we were astonished when the whole house was ______ into darkness.
A.dropped
B.dived
C.drowned
D.plunged
土工膜是()材料。
A.不透水
B.透水
C.渗水
D.反滤