更多“优级纯化学试剂标签上标明的符号为（）。”相关的问题
You may not know it, but your body is constantly under attack. The enemies are microscopic invaders called "microbes" or "germs" Microbes, such as bacteria and viruses, are all around you. They live in the air you breathe, on the surface of your skin, and even in the food you eat. 1 No. Some germs actually aid certain bodily functions—digestion for one. But some germs can make you very sick. When you get an infection or disease, it is usually because harmful germs have invaded your body and multiplied. They attack and damage your cells.Germs spread fast. A single bacterium can multiply into several thousand in just a few hours. If your body had no way of stopping harmful bacteria and other microbes, they would soon overwhelm you. You could not survive for very long. Luckily, your body has defenses against these invaders. Your skin is your first line of defense. 2 Skin is made of two main layers. They are the inner layer, called the "dermis", and the outer layer, called the "epidermis". The cells at the surface of the epidermis form a tough, waterproof shield which most germs can not penetrate.In addition, organs in the skin help control the number of genus at the surface. The dermis contains thousands of oil glands. The fluid they produce reaches the surface of the skin through pores. Chemicals in the oil help keep germs from multiplying. 3 Germs can invade through a cut in the skin or through any natural opening of the body. When germs invade, white blood cells arrive to attack them. Two kinds of white blood cells work together to combat disease-causing germs.One kind of white blood cell is called the "chemical-warfare" branch of your body"s defenses. These cells produce antibodies chemicals that help combat germs. Antibodies travel through your bloodstream to search out invading germs. They lock onto the germs, giving them a chemical coating that identifies them as harmful. 4 The antibodies give you "immunity"—the ability to resist infection and disease. Once you have had certain illnesses, such as chicken pox and measles, you probably will never have them again. This is because the white cells will "remember" them and quickly produce antibodies. 5 A vaccine is a preparation of dead or weakened germs. It does not give you the disease, but it triggers the production of antibodies as if you were actually ill. Vaccines can save your life by helping your body to protect you.The other kind of germ-fighting white blood cells are the "foot soldiers" of the body"s defense system. They surround germs and digest them with powerful enzymes. They are able to recognize harmful germs because of the chemical coating the antibodies have given them. The white cells are bigger than most germs. One of them can destroy large numbers of the invaders.Some of these white cells die when defending the body. The dead cells, along with body fluids, damaged tissue, and dead germs, form pus. When you see pus around a wound, you know that your white cells have been fighting and dying to protect you.Complete the article with the following sentences. There are two extra sentences that you do not need.A. How does your skin protect you against germsB. Vaccines are dangerous because they give us the diseases.C. Are all germs harmfulD. How many different kinds of these cells that fight germs are thereE. Vaccines can give you immunity against some disease such as smallpox and polio.F. How do germs get into your body, and what happens when they doG. These white cells manufacture a different antibody for each kind of germ.
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氨水又称阿摩尼亚溶液，具有极强的刺激性臭味。
A . 正确
B . 错误
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请根据以下某行政单位4月份的经济业务，编制会计分录。按规定计提本月职工福利费3500元。
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《冲击期化石》的作者（）。
A.郑伯奇
B.成仿吾
C.张资平
D.张恨水
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食品添加剂使用的基础要求有()?
A. 不应掩盖食品本身或加工过程中的质量缺陷，或以掺杂、掺假、伪造为目的而使用食品添加剂 B. 不应对人体产生任何健康危害 C. 不应降低食品本身的营养价值 D. 不应掩盖食品腐败变质 E. 在达到预期效果的前提下尽可能降低在食品中的使用量。
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下表是中国人民银行资产负债简表。 根据会计原理，资产必等于负债，即整理可得：M0=(Aa-La)+(Ab-Lb)+(Ac-Lc)，试回答下列问题：财政若出现赤字，采用发行政府债券的办法弥补，由（）购买不会引起货币供应量扩张。
A．企业
B．中央银行
C．商业银行
D．个人
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145.终末期慢性肾衰竭的最主要死亡原因是
A.心脑血管并发症
B.严重感染
C.严重电解质紊乱
D.尿毒症脑病
E.消化道大出血
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某物业服务企业向市房管局申请晋升为二级资质等级。市房管局审核后报省住房和城乡建设厅决定。省住房和城乡建设厅作出不准予晋升的决定。该企业不服，拟寻求救济。下列哪个选项的说法错误( )
A．该企业有权以市房管局为被告起诉B．该企业有权以省住房和城乡建设厅为被告起诉C．该企业不服申请行政复议的，必须以省住房和城乡建设厅为被申请人D．若市房管局不予审核，该企业有权以该市房管局为被告起诉
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犯罪嫌疑人李某涉嫌非法经营罪于2月7日被甲地公安机关冻结存款，到期没有续冻。9月6日乙地公安机关发现李某涉嫌非法吸收公众存款，可以将李某的存款再次冻结。
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黄连、胡黄连均能清热燥湿解毒，而胡黄连长于（）
A.清泻胃火 B.清泻心火 C.清中焦湿热 D.除疳热 E.燥湿解毒
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公开发行股票的股份公司为公众公司，其中，在证券交易所上市交易的股份公司称为上市公司；符合公开发行条件、但未在证券交易所上市交易的股份公司称为非上市公众公司，非上市公众公司的股票将在柜台市场转手交易。
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"十二五"时期，促进中小企业发展是改造提升制造业的重大举措，应建立健全中小企业（）体系。
A . 金融服务和价格担保
B . 金融服务和信用担保
C . 价格担保和财税均衡
D . 信用担保和财税均衡
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鼻炎康片功能清热解毒，宣肺通窍，消肿止痛，可用于风邪蕴肺所致的（）。
A.急性鼻炎
B.慢性鼻炎
C.过敏性鼻炎（属虚寒证者）
D.头痛
E.过敏性鼻炎（属实热证者）
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