第6题: [单项选择]背景材料:某工程C30混凝土实验室配合比为1:2.12:4.37,W/C=0.62,每立方米混凝土水泥用量为290kg,现场实测砂子含水率为3%,石子含水率为1%。使用50kg一包袋装水泥,水泥整袋投入搅拌机。采用出料容量为350L的自落式搅拌机进行搅拌。试根据上述背景材料,计算以下问题。(计算结果四舍五入,保留两位小数)该混凝土按规定每搅拌()盘做一组供强度检验用的试件。 A. 10 B. 50 C. 100 D. 200 参考答案:C
第23题:[单选题]下列关于竹质脚手架材料的说法中,错误的是( )。 A.A.竹质立杆、斜撑、顶撑、抛撑、剪刀撑、扫地杆和纵向水平杆的小头一般不小于75mm B.B.竹质纵、横向水平杆的小头不小于 90mm C.C.对直径为60~90mm的水平杆杆件,应双杆合并使用 D.D.主要受力杆件的使用期限不宜超过 3年 E. 参考答案:D
第24题: [单项选择]—Did you see her off the day before yesterday —No, but I wish I ______. A. were B. did C. had D. would 参考答案:C 答案解析:[解析] 本题考查虚拟语气。事实上他前天没有去,现在是他希望前天送了那个人,与过去事实相反,用had done。“你前天有没有去送她 没有,但我希望我送她了。”
第30题: [单项选择]Passage Two Questions 29 to 31 are based on the passage you have just heard.A) They were driven by steam engines. C) They were pulled by riders themselves. B) They were pulled by animals or humans. D) There were totally unusable. 参考答案:B 答案解析:[听力原文] Which of the following is true of early elevators
第31题: [单项选择]下列现象,哪一项发生于明代?() A. 相秉社稷之重,总百僚之任 B. 置使以总国计,应四方贡赋之入,朝廷不预,一归三司 C. 内阁职参机务,今止票拟,而裁决归近司 D. 威命所寄,不于内阁而于军机处,盖隐然执政之府矣。 参考答案:C