关于防水混凝土施工技术的说法,正确的有()。 A. 混凝土胶凝材料总量不宜小于320kg/m3,其中水泥用量不宜小于260kg/mB.砂率35%~40%,泵送增至45% B. 防水混凝土采用预拌混凝土时,入泵坍落度宜控制在120~160mm,坍落度每时损失不应大于20mm,坍落度总损失值不应大于40mm C. 墙体有预留孔洞时,施工缝距孔洞边缘不应小于200mm D. 养护时间不得少于14d
【单选题】听力原文:Man: Obviously you can’t force people to be interested, but they can go away saying ‘That was a really good presentation’ and how do you do that? Well, for me, the golden rule is, don’t run over ...
【简答题】听力原文:Adviser: Good afternoon. How can I help you? Student: Good afternoon. My name is Helena Schwarz. I have an appointment at three. Adviser: Ah, yes. Come in. Please, take a seat .... Now, what can ...
【单选题】·YOU will hear another five recordings. ·For each one decide what speakers are talking about. ·Write one letter(A-H)next to the number of the recording. ·DO not use any Ietter more than once. ·After y...