重型炉墙内层的标准耐火砖一般规格是()
A、240㎜×120㎜×50㎜
B、246㎜×124㎜×56㎜
C、230㎜×113㎜×65㎜
D、236㎜×123㎜×60㎜
参考答案:C
圆形股电梯用钢丝绳,其中代号3指代的是()。
A.绳股
B.钢丝
C.绳芯
—Is the boy by the window your brother?
—It ______ him. [ ]
A. maybe
B. may be
C. would be
D. need be