有关分子、原子描述正确的是[ ] A．分子能保持物质的化学性质，而原子不能 B．

下列哪项是非抗原特异性循环免疫复合物的理化检测技术（）

A.PEG比浊法

B.C1q固相法

C.mRF凝胶扩散试验

D.Raji细胞法

E.抗C3-CIC-ELISA

()等人提出了四种反思的方法。

A．波斯纳

B．科顿

C．布鲁巴奇

D．加涅

某化学研究性学习小组用如图所示的装置做有关实验．

①甲同学将收集满CO₂气体的试管倒插入紫色石器试液中（见装置A），并轻轻振荡试管．

I．描述产生的现象：______；

II．写出反应的化学方程式：______．

②乙同学挤压装置B中滴管的胶头，使其中的NaOH溶液滴入烧瓶，并轻轻振荡，观察到的现象是______，产生这一现象的原因是：______．

第三部分：阅读理解（共15小题；每小题2分，满分30分）

阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

One of today’s hottest topics among women (and to an extent among men too now) is anti aging and how to reverse the signs of age. The beauty industry has responded to this by offering a wide collection of anti aging creams and other anti aging products aimed at all pocketbooks, ranging from economical to highly priced.

And the question is “do any of these often much-vaunted(被过度吹嘘的) anti aging creams actually work?” And if they do, how precisely do they perform their miracles?

Well, the appropriate response to that is that they do work—after a fashion. There certainly are anti aging creams available for a relatively modest price that will reduce the appearance of wrinkles in a comparatively short period of regular application. But this really is the limit of their powers: they won’t actually undo skin damage or eradicate(根除) all signs of age; they will simply modify them, some more effectively than others.

The way they work is like so: they remove upper layers of dead skin cells and make deeper layers absorb water, serving to plump them up and make them look fuller and healthier. But since such anti aging creams only go skin deep, as it were, skin damage will reappear once you stop using the anti aging wrinkle(皱纹) cream.

This means fairly heavy regular use, which might be costly depending on your choice of product. However, if you can afford it or think it’s worth the cost, it won’t be such an issue. After all, what woman wants to look older than her years when looking good is so tied up with many women's self-esteem(自尊) and sense of identity.

A compromise(折中) solution for those on a tighter budget is to use the cheaper creams. In addition, it’s always wise to be a little experimental to make sure you end up with the one that suits your skin best.

So, to sum up: an anti wrinkle face cream will work within limits, depending on your objective.

41.   This passage mainly tells us something about _____.

A. anti aging creams                         B. anti aging foods

C. anti wrinkle face                          D. anti wrinkle skin

42.   According to the author, we can infer _____.

A. anti aging creams must reverse the signs of age

B. skin damage must not reappear after using creams

C. anti aging creams should be properly used

D. skin damage will disappear forever after using creams

43.   The benefits from anti aging creams are the following except that _____.

A. they remove upper layers of dead skin cells

B. they make deeper layers absorb water

C. they make layers look fuller and healthier

D. they make wrinkle faces rough

44.   The meaning of the underlined phrase “on a tighter budget” is _____.

A. having a larger amount of money

B. having a smaller amount of money

C. having no money at all

D. having a lot of money

45.   Fairly heavy regular use will make you _____.

A. spend much money on your choice of product

B. easily afford your choice of product

C. think your choice of product wrong

D. believe your choice of product right

衡量金属材料表面软硬的力学性能是塑性。