题型:填空题 — What do you think of this kind of TV set, which __ in Shanghai? — Well, I don’t care such things.A.was madeB.is madeC.has been made D.had been made 查看答案
题型:填空题 某基坑支护结构安全等级为二级,垂直开挖,采用复合土钉墙支护,设一排预应力锚杆,锚杆水平间距1m,结构计算宽度1m,自由段长度为5.0m。已知锚杆计算宽度内的弹性支点水平反力值为250kN,水平倾角20°,锚孔直径为150mm,土层与砂浆锚固体的极限黏结强度标准值qsik=46kPa,锚杆极限抗拔承载力标准值RK=1.3NK。锚杆的设计长度至少应取()时才能满足要求。()A.16.0mB.18.0mC.21.0mD.24.0m 查看答案