碳素钢丝两端采用镦粗头时，预应力钢丝按孔道长度增加( )计算。
A．0.15m B．0.20m C．0.30m D．0.35m
参考答案：D
In a traditional Chinese wedding, the newly married couple(夫妻)are usually _______in red.
A．worn
B．had
C．dressed
D．put
下列物理量的单位属于国际单位制基本单位的是[ ]
A．安培
B．牛顿
C．摄氏度
D．特斯拉
