混凝土用量不变时,()不变,只换算混凝土强度等级或石子粒径。 A.人工费 B.材料费 发布时间:2018-04-11 06:44 │ 来源:www.tikuol.com 题型:多项选择题 问题: 混凝土用量不变时,()不变,只换算混凝土强度等级或石子粒径。A.人工费B.材料费C.机械费D.措施费
题型:多项选择题 Waste paper shouldn't ______ everywhere. It's our duty to keep our classroom clean. [ ]A. be thrown B. throw C. is thrown D. are thrown 查看答案