_______ , and he felt hopeless.

A．Because Charles was sentenced to death

B．As Charles was sentenced to death

C．Sentenced to death

D．Charles was sentenced to death

钢筋经过拉伸试验，能反映钢筋的性能的是( )。

A．屈服点和抗拉强度

B．弹性极限、屈服点、抗拉强度

C．强度性能、塑性性能

D．强度性能、塑性性能、抗冲击性能