15.板与板的连接时，当缝宽大于（）时，宜用细石砼浇筑。
A.20mm
B.30mm
C.40mm
D.50mm
参考答案：A
– You’ve donated so much money. Thanks a lot.
– ______.
A. It’s my pleasure
B. Take it easy
C. That sounds great
简述德式面包与美式面包特点？
