圆柱孔的定位方式主要有（）。
A.自动定心定位
B.定位套定位
C.V形架定位
D.锥孔定位
E.长圆柱孔定位
F.短圆柱孔定位
参考答案：E, F
----I have tried very hard to find a solution to the problem, but in vain
----why not consult with Frank? You see, _________.
A．great minds think alike
B．two heads are better than one
C．a bird in the hand is worth two in the bush
D．it’s better to think twice before doing something
汽车行驶的驱动力和附着条件是什么？
