—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

电阻点焊的优点有（）。

A．焊接过程中不产生烟或蒸气

B．不需要对焊缝进行研磨

C．焊接强度高、受热范围小

D．焊接成本比气体保护焊等低