预应力筋张拉锚固后实际预应力值的偏差不得大于或小于工程设计规定检验值的( )。
A. 20%
B. 15%
C. 10%
D. 5%
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He died and ______ nothing.
A. leave
B. leaves
C. left
Today is ______ colder than yesterday.
A. much
B. more
C. many
采用控制应力法冷拉钢筋,HRB400级钢筋的控制应力为( )N/mm2。
A. 370
B. 450
C. 490
D. 580
钢筋是通长计算的,施工时如遇洞口时,在距洞口边25mm处断开。钢筋搭接长度为( )d(d为钢筋直径)。
A. 10
B. 20
C. 30
D. 35