刮削机床导轨时,以()为刮削基准A、溜板用导轨 B、尾坐用导轨 C、压板用导轨 发布时间:2017-07-02 09:15 │ 来源:www.tikuol.com 题型:单项选择题 问题: 刮削机床导轨时,以()为刮削基准A、溜板用导轨 B、尾坐用导轨 C、压板用导轨 D、溜板摸向燕尾导轨
题型:单项选择题 _____ for five minutes; why don’t they come? A.am callingB.calledC.was callingD.have been calling 查看答案