光纤熔接机清洁物镜时,电极压板螺丝不用完全卸下。 ( )
参考答案:对
--- The football game was not interesting, was it?
---_____. Even John, who _____ to the super fans, didn’t enjoy it.
A.Yes, is belonged
B.No, is belonged
C.Yes, belongs
D.No, belongs
为什么要注意集输管线的压强变化?