下述实验不能达到预期实验目的是（）序号实验内容实验目的A向盛有10滴0.1m

发布时间：2017-05-05 12:39 │ 来源：www.tikuol.com

题型：选择题

问题：

下述实验不能达到预期实验目的是（　　）

序号	实验内容	实验目的
A	向盛有10滴0.1mol/L AgNO₃溶液的试管中滴加0.1mol/L NaCl溶液，至不再有沉淀生成，再向其中滴加0.1mol/L Na₂S溶液	证明AgCl能转化为溶解度更小的Ag₂S
B	向2mL甲苯中加入3滴KMnO₄酸性溶液，振荡；向2mL苯中加入3滴KMnO₄酸性溶液，振荡	证明与苯环相连的甲基易被氧化
C	向Na₂SiO₃溶液中通入CO₂	证明碳酸的酸性比硅酸强
D	向淀粉溶液中加入稀硫酸，水浴加热，一段时间后，再加入新制的氢氧化铜并加热	验证淀粉已水解

A．A

B．B

C．C

D．D

考点：沉淀溶解平衡苯的同系物蔗糖淀粉实验操作达到的预期目的

题型：选择题

阅读理解。

How to Make a Budget (预算)
Most likely, you aren't the family breadwinner. But doing a small job or getting a weekly allowance (零花钱)
would put some money in your pocket. For kids and grown-ups alike, money is easy to spend. If you aren't
careful, it can be gone in no time. Being responsible with your money is an important skill to learn－and the
sooner you start the better. Whether you are tracking your spending or saving for something special, creating
a budget can help you deal with your expenses and plan for the future. All you need are paper and a pencil－and
some self-control. First, take a look at our sample monthly budget. Then, use a separate sheet of paper to plan
your own. In the first two columns (栏), list your sources (来源) of income and how much you expect to earn
form them. In the third and fourth columns, list what you expect to spend your money on and the amount.

The left-hand total should
be more than or equal to the
right-hand total. If it is, you
have an effective budget.
Budgets are not complex,
but sticking to them can be
tough. When planning your
budget, be realistic about
your expenses. If you know

Sample Monthly Budget

Monthly Income	Amount	Monthly Expenses	Amount
Allowance	$ 20.00	Snacks	$ 26.00
Money earned Selling drinks	$ 25.00	Music downloads	$ 12.00
Money earned babysitting	$ 12.50	Movies	$ 18.00
Money earned	$ 30.00	Video rentals	$ 10.00

that you drop $ 18 at a movie, don't write $ 12 in that space simply because you wish you were spending less.
If you are eyeing a big purchase, such as a $ 150 skateboard, spend less and save more until you have the
total amount. No matter how attractive it may be, avoid spending your savings. One day, you will thank yourself?

1. Who is the passage written for?

A. Children
B. Parents.
C. Breadwinners.
D. Bank managers.

2. The purpose of making a budget is to help people ______.

A. learn to be realistic
B. increase their savings
C. manage their money well
D. test their power of self-control

3. What should people do when planning a budget?

A. Fill in the expenses as they really are.
B. Avoid spending money on expensive things.
C. Set aside a fixed amount of money as savings.
D. List income and expenses on two pieces of paper.

4. Which of the following budgets is effective?

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中国近现代史上先后出现两部重要的宪法，其中一部宪法规定：“中华民国的主权属于国民全体。”另一部则规定：“中华人民共和国的一切权力属于人民。”这两部宪法最大的不同是

A．制定背景不同

B．性质不同

C．具体内容不同

D．颁布机构不同

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墨家重视俭朴。

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Ⅰ.据报道，美国耶鲁大学的生物学家正在从事将病毒引诱到人体“陷阱细胞”中，以防止病毒繁殖的试验研究。例如，HIV通过T细胞表面的CD4识别T细胞（如图甲），如果给AIDS患者注射大量用CD4分子修饰过的红细胞（如图乙），则该红细胞也会被HIV识别、入侵。但HIV在红细胞中无法完成复制增殖，最后随红细胞的死亡而被清除，该方法目前已经在小鼠体内获得阶段性成果。

某生物兴趣小组设计一个模拟实验来研究人体的免疫系统的某种防御作用。实验材料：可封口的无菌塑料透明袋4个、表面消毒的新鲜苹果4个、腐烂的苹果肉少许。实验器具：无菌棉棒、牙签、外用消毒酒精等。

小组同学将实验分为四组分别作如下表处理。在实验进行的一星期中，每天定时观察约15min，记录观察结果。请回答：

小组同学模拟的是人体非特异性免疫中（）的屏障作用。实验中，腐烂果肉模拟的是（）。

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医学伦理学的时代性在（）

A.医学伦理学的内容深刻反映时代的经济、社会要求和医学科学的发展和进步

B.古代医者把尊重和保护病人的健康和生命作为自己的行为准则

C."普同一等"、"一视同仁"是古今中外医学共有的伦理观念

D.古代的医德规范今天仍然有规范医者的价值

E.医学伦理学的思想内容是医学实践和科学进步提出的客观要求

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下述实验不能达到预期实验目的是（ ） 序号实验内容实验目的A向盛有10滴0.1m

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下述实验不能达到预期实验目的是（）序号实验内容实验目的A向盛有10滴0.1m