对构件施加预应力主要目的为( )。
A.(A) 提高承载力
B.(B) 提高抗裂度,充分利用高强材料
C.(C) 检验材料
D.(D) 节省材料
参考答案:B
Madonna ____a straight A student,but it was dancing that she was really crazy about.
A.must be
B.could be
C.must have been
D.could have been
“水涨船高,人抬人高”是王有龄的名言。