冷轧带肋钢筋中()为普通钢筋混凝土用钢筋。
A.HPB235
B.HRB335
C.CRB550
D.CRB650
参考答案:C
解析:CRB550用于非预应力钢筋混凝土。
The Best Way to See Lakeland
小题1:What can you see if you choose Tour A?
A.Yewdale Valley
B.Coniston Water
C.Castlerigg Stone Circle
D.Beatrix Potter’s Hill Top farm小题2:How much will Simon, a boy of 12, and his father pay if they want to choose Tour A and Tour B?
A.£84.00
B.£109.00
C.£104.00
D.£144.00小题3:When does the coach leave Windermere if you choose Tour B?
A.09.45 hrs
B.17.00 hrs
C.12.00 hrs
D.16.30 hrs
北方的农民在秋季晴天的夜晚经常点然成堆的秸秆等,从而产生滚滚的浓烟。有关这一做法正确的是 [ ]
A、有利于对太阳辐射的削弱,使白天气温不至于过高
B、有利于大气直接吸收太阳辐射,起增强作用
C、浓烟使大气逆辐射增强,起保温作用
D、浓烟起反光镜的作用,反射部分太阳辐射回宇宙空间