( )长度一般为构件长度减去两端保护层厚度。
A．弯钩
B．弯起钢筋
C．箍筋分布
D．钢筋搭接
参考答案：C
You can do what you want to do, but never follow the ________. [ ]
A. people
B. time
C. crowd
D. society
已知2.4g金属镁跟50g某硫酸溶液恰好完全反应，试计算这种硫酸溶液中溶质的质量分数．
