起重机吊钩的挂绳处断面磨损超过高度()时应更换。A、10% B、20% C、30% 发布时间:2019-08-30 13:41 │ 来源:www.tikuol.com 题型:单项选择题 问题: 起重机吊钩的挂绳处断面磨损超过高度()时应更换。A、10%B、20%C、30%D、40%
题型:单项选择题 Alice, you were supposed ________ your paper last Sunday. Why haven't you finished it yet?[ ]A. to finishingB. to have finishedC. finishingD. having finished 查看答案