This used piston had been tested and a

1、A customer had been&

A customer had been given a proposal for a p5-570 6-way 32GB system running in&#8...

2、He had been kept in quarantine for a w

He had been kept in quarantine for a week.（）A他接到隔离审查长达一周。B他接受了一星期的检疫隔离。C有一周时间，他无法和外界联络。D一周以来，他一直在接受审查。

3、If clearance between a piston and the

If clearance between a piston and the cylinder wall is excessive, piston slap will occurThe slap itself is caused by （）Aalternation of side ...

4、Piston compression rings used in a die

Piston compression rings used in a diesel engine function to （）Atransfer heat from the cylinder to the pistonBscrape oil from the sides of the pistonCseal the combustion space from the crankcasesDprevent any piston contact with the cylinder liner

5、This is a close and that is abathroom的

This is a close and that is abathroom的中文意思是（）。AA、那是客厅，这是卧室BB、那是电话表，这是价目表CC、这是壁厨，那是卫生间DD、这是节目单，那是电话表

6、In a radial piston pump, reversal and

In a radial piston pump, reversal and control of fluid flow are accomplished by moving the （）.Acentral valveBradial plungerCfloating ringDcylinder body