下列说法正确的是 A．在加热、甲醛、饱和(NH4)2SO4溶液、X射线作用下，蛋

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问题：

下列说法正确的是

A．在加热、甲醛、饱和(NH4)2SO4溶液、X射线作用下，蛋白质都会发生变性

B．氨基酸、蛋白质、油脂都含有C、H、O、N四种元素

C．生活中食用的食醋、植物油、动物蛋白等物质都是混合物

D．乙烯、聚乙烯、甲苯均能使酸性高锰酸钾溶液褪色

考点：葡萄糖油脂纤维素氨基酸
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阅读下面短文，完成信息卡：
这是某学校通过校长意见箱收集到一些学生的意见和建议。请阅读下文，根据所提供的，
完成下列表格。

Zhang Hongying, girl, 15
     I want to make our lunch time longer. At the moment, lunch time is short. Most of
my classmates would like to do their homework during this time. But if they don't get a
good rest, they won't have enough energy for the afternoon. So I would like to have
more time and have time to take a nap (午睡) after lunch. That way, we'll learn better in
the afternoon.
Zhao Pengran, girl, 15 
     I would like to have more chances to talk in English. Now, the English classes are
not enough for us to practice speaking English. I think we'd better have one morning a
week at least to have spoken English lessons in order to improve our English.
Zhou Jiancheng, boy, 15
     My idea would be to have more fashionable school uniforms. If I were the headmaster,
I would ask the students to design the uniforms themselves. We could have a contest
among student designers. Then, we could ask others to choose their favourite. This way,
we'll be able to wear what we like best. How nice it would be for us young people!
                                                    Information Card
1. What would Zhao Pengran like to do in
    order to improve English? 		1.                                                             
2. What's Zhou Jiancheng's idea? 2.                                                             
3. What would Zhang Hongying like to do
     after lunch? 		3.                                                             
4. What do most students do during
     lunch time? 		4.                                                             
5. How old are the students? 5.                                                             
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下列各组物质之间的化学反应，反应产物一定为纯净物的是[ ]

A．+ Br2(CCl4)

B．CH2=CH-CH2-CH3+HCl 

C．CH3-CH=CH3 + H2O 

D．CH4+Cl2 

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下列实验设计和结论相符的是 [ ]

A. 在含FeCl2杂质的FeCl3溶液中通足量Cl2后，充分加热，除去过量的Cl2，即可得到较纯净的FeCl3溶液  

B. 现在媒体谈论的PM2.5是指环境空气中空气动力学当量直径≤2.5um的颗粒物。直径为2.5um的颗粒物分散到空气中能形成胶体

C. 某无色溶液中加Ba(NO3)2溶液，再加入稀盐酸，沉淀不溶解，则原溶液中一定有SO42-

D. 加入氢氧化钠溶液并加热，产生的气体能使湿润红色石蕊试纸变蓝，一定有NH4+  

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—You didn't wait for Mr. Black last night, did you
—No, but we（）. He didn't return home at all.

A. couldn't have

B. needn't have

C. didn't need to

D. should wait have
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工商行政管理机关可以对经营者的违法行为进行行政处罚，但不得采取的措施是（）。

Ａ.罚款

Ｂ.警告

Ｃ.吊销营业执照

Ｄ.行政拘留
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