预应力筋进场时,应分批检验,每批重量不大于60t的钢材是()。
参考答案:钢丝
I had been working on math for the whole afternoon and the numbers ________ before my eyes.
A.swim
B.swam
C.swimming
D.had swum
高压容器做局部补强最常采用()结构。