A.全部B.1/2C.1/3D.1/4
A.游標(biāo)卡尺B.百分表C.鏨子D.刮刀
A.直研、橫研、對(duì)角研B.直研、調(diào)頭研、對(duì)角研C.調(diào)頭研、橫研、對(duì)角研D.直研、橫研、調(diào)頭研