活塞在上止点时，活塞顶上部的气缸容积称为( )。
A
暂无解析
The terms of payment we wish to adopt are confirmed and irrevocable letter of credit.
Do you think companies should provide sports facilities for their staff?(Why?)
In some cultures old people are more valued, while in other cultures the youth is more valued. Discuss both these views and give your own opinion.
Rubber protector
On Open Policy