水泥混凝土路面硬化初期出现不规则裂缝,可能的原因有______。 A.切缝不及时 B 发布时间:2017-05-12 14:16 │ 来源:www.tikuol.com 题型:多项选择题 问题: 水泥混凝土路面硬化初期出现不规则裂缝,可能的原因有______。A.切缝不及时B.养护不当C.温差太大D.路面厚度太大E.水泥用量太少
题型:多项选择题 --Must I finish my homework now?--No, you _______ You can do it tomorrow.A. can't B. needn't C. mustn't 查看答案
题型:多项选择题 — Jack, this is the third time that you have been late this week.— Sorry, sir, but I was ______ for 15 minutes on the way here in the traffic jam.A.held upB.put upC.taken upD.given up 查看答案