为便于施工,预埋连接钢筋的直径不宜大于(),且弯折时宜缓慢进行加热,以免其强度降低过多。
A.18mm
B.20mm
C.22mm
D.24mm
参考答案:C
You can't complain of being left out you don't make any effort to share your happiness and sorrow
with others.[ ]
A. when
B. unless
C. once
D. though
消防栓和喷淋系统要怎么处理?