如图所示单杆活塞缸，工作台右移动时速度为V1，推力为F1；工作台左移时速V2，推力F2为下列四种情况中，正确的是()。
A. V2＜V1，F2＜F1
B. V2＞V1，F2＞F1
C. V2＞V1，F2＜F1
D. V2＞V1，F2＞F1
If your customer need some extra service．you should
A. politely say no to them．
B. offer as much help as you could．
C. fax the related information to them．
A．stillB．everC．never
A. still
B. ever
C. never
A．onB．ofC．with
A. on
B. of
C. with
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