第32题: [单项选择]According to the researchers, cream sours faster than butter because bacteria ______ A. are mom evenly distributed in cream B. multiply more easily in cream than in butter C. live on less fat in cream than in butter D. produce less waste in cream than in butter. 参考答案:B 答案解析:根据第三段的"The bacteria which make the food go bad prefer to live in the watery regions of the mixture
第33题: [多项选择]编制ENR造价指数的资料来源于( )。 A. 10个欧洲城市 B. 20个美国城市 C. 5个亚洲城市 D. 2个加拿大城市 E. 2个澳洲城市 参考答案:B,D