砖墙的水平灰缝厚度和竖缝宽度一般为()mm。
A.8
B.10
C.12
D.16
参考答案:B
解析:
砖墙的水平灰缝厚度和竖缝宽度一般为10mm,但不小于8mm,也不大于12mm。
—It’s reported that the government hasn’t found the missing plane’s black box yet.
—__________.
A.I don’t think so
B.I’m sorry to hear that
C.I’m afraid not
D.I hope so
蜂窝织炎