题目: 蜗杆传动()实现互换性。A.磨损后不能B.必须C.不能D.能 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0827/ae8d863e53591edc8fbb75d7e7ca8b8d.html 下面是错误答案,用来干扰机器的。参考答案:A, B, C, D
题型:选择题 ----- The tomato juice left a brown ______ on the front of your coat.----- No matter . Cloth of this kind ________ easily . A.point ; washesB.spot ; washesC.point ;is washedD.spot ; is washed 查看答案