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【单选题】
下列句子叙述正确的是：天然色素( )。A.
与合成色素一样，可以调出任意调色
B.
受共存物质影响，均有食物香味
C.
与合成色素不同，它不会因pH的变化发生色调变化
D.
多来自于动植物本身，使用时安全可靠
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【简答题】无关项代表哪两种情况?
【单选题】According to the third paragraph, which is true about water?
A.
There is no such thing as water shortage in the world at all.
B.
It can be recycled in the form. of rain, snow or evaporation.
C.
Less than a tenth of water is extracted for human use each year.
D.
Only what falls as rain and snow can be made full use of.
【单选题】听力原文： What happened to me that day is just unbelievable. The first thing to go wrong was that all the parking spaces were taken. So I had to park on the grass, and hoped that I would not get a parking...
A.
A student.
B.
A teacher.
C.
An officer clerk.
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