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问题 单项选择题

人造奶油是用植物油经过氢化饱和后制得，其中仍会有一些未被饱和的不饱和脂肪酸，其结构发生改变，变为( )。

A．饱和脂肪酸

B．多不饱和脂肪酸

C．单不饱和脂肪酸

D．反式脂肪酸

答案

参考答案：D

解析： 人造奶油的结构由顺式变为反式，即变成反式脂肪酸。

多项选择题

新娘日妆与晚妆可以考虑（）的不同，妆面的浓淡程度也有不同。

A.环境光线

B.个性气质

C.日夜温差

D.场合气氛
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问答题

The World Health Organization considers smoke from dirty stoves to be one of the five most serious health risks that face people in poor, developing countries. Nearly 2 million people die from its effects each year, more than twice the number from malaria. And because the smoke contains greenhouse gasses such as carbon dioxide and methane, as well as black carbon, it contributes to climate change.
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