第8题: [单项选择]( )燃气完全燃烧所放出的热量称为燃气的热值,单位kJ/Nm3。 A. 1Nm3 B. 5Nm3 C. 10Nm3 D. 100Nm3 参考答案:A 答案解析:本题的考点是城市燃气的种类。燃气按来源分类,可分为天然气、人工煤气、液化石油气和生物气四大类。燃气按热值分类,可分为高热值、中热值、低热值燃气。1Nm3燃气完全燃烧所放出的热量称
第12题: [单项选择]The low levels of depression in China show that_____. A. Chinese people are happier than western people B. Chinese do not think in such way as the westerners do. C. Chinese are more conservative concerning depression. D. Chinese pay more attention to physical illness 参考答案:B 答案解析:答案见第四段,讲到中西方文化差异导致行为不同。故选B。