题目: 拱结构,即中间高四周低呈弧形的曲面;拱结构对承受荷载有利,在较大跨度情况下,建筑多采用拱结构。这样的结构()A.即有利于承载,又美观B.不利于承载,但美观C.即不利于承载又不美观D.设计者的习惯而已 答案: 参考答案:A
题型:选择题 There were so many cars held up by the heavy rain on the road that we had no but to wait. [ ]A. alternative B. difference C. relation D. opposition 查看答案