钢筋的性能主要包括( )。
A.抗拉性能
B.硬度
C.冷弯性能
D.冲击韧性
E.强度
参考答案:A,B,C,E
PT泵的调节要素是(),故称PT泵。
His proposal is()to all of us and you do not need to tell us more about it.
A.apparent
B.appearing
C.approaching
D.apart