Men all over Scotland started to wear kilts _______.
A. in the late 1700s
B. in the early 1800s
C. in the 1700s and early 1800s
D. by about 1850
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地下工程防水设计，高聚物改性沥青防水卷材，双层使用时，总厚度不应小于______mm。
A. 2
B. 4
C. 6
D. 8
防水涂料施工，基层处理剂若使用水乳型防水涂料，可用掺______乳化剂的水溶液或软化水将涂料稀释。
A. 0.2%～0.5%
B. 0.3%～0.6%
C. 0.1%～0.4%
D. 0.4%～0.7%
The main idea of the text is that _______.
A. people can't live without money.
B. money is as important as work.
C. the main object of the people's lives should not be money but work.
D. the entire object of the people's lives is making money.
溶剂型涂料贮运和保管环境温度不宜低于______℃。
A. -5
B. -1
C. 0
D. 1
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