根据平行的投影面不同,投影面平行面有三种:();()侧平面。 发布时间:2020-01-29 20:05 │ 来源:www.tikuol.com 题型:填空题 问题: 根据平行的投影面不同,投影面平行面有三种:();()侧平面。
题型:填空题 Once he has decided to do something,he’ll never give up______.[ ]A.no matter how it is hard B.however is it hardC.no matter how hard it is D.however hard is it 查看答案