研磨导套常见的缺陷是()。 A.疲劳 B.腐蚀 C.裂纹 D.喇叭口 发布时间:2018-05-12 15:02 │ 来源:www.tikuol.com 题型:单项选择题 问题: 研磨导套常见的缺陷是()。A.疲劳B.腐蚀C.裂纹D.喇叭口
题型:单项选择题 Now that you’re grown up,you’d better spend your time just on the things you find_______.A.worth doing them B.worth being doneC.worthy of doing them D.worthy of being done 查看答案