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【单选题】
1 It's been 40 years since the surgeon general issued the first report warning that cigarettes cause cancer. Since then, the public has grown acutely aware that smoking is lethal. But though the public education campaign has been a great success in providing information, it's been a failure in one conspicuous way: 46 million American adults still smoke. 2 How come? Because it's so hard to quit. Nicotine is so powerfully addictive that lots of people find it impossible to give up--even with lung cancer, emphysema and heart disease staring them in the face. Despite an array of products and strategies designed to help people conquer the habit, cigarettes remain a major killer in this country. 3 If we want to know how to reduce the death toll from tobacco use, we might want to look at Sweden, where smoking among men has dropped sharply in recent years. How come? Brad Rodu, a professor of pathology at the University of Alabama at Birmingham, says one big reason is that a lot of Swedish smokers have switched to smokeless tobacco. 4 That may sound like a pointless exercise, substituting one deadly addiction for another. In fact, snuff and other unsmoked forms of tobacco are not nearly as risky as the kind you ignite and inhale. 5 A 2002 report by Britain's Royal College of Physicians noted that 'the consumption of non-combustible tobacco is of the order of 10 to 1,000 times less hazardous than smoking.' Smokeless tobacco is known to cause oral cancer. But Rodu estimates that if everyone now smoking made the change, the annual number of tobacco related deaths in the United States would plunge from 440,000 to 6,000. 6 U.S. Surgeon General Richard Carmona, who says he would like to ban all tobacco products, insists that 'there is no scientific evidence that smokeless tobacco products are both safe and effective aids to quitting smoking.' Anti-smoking groups portray smokeless tobacco as an intolerable danger. But a growing pile of evidence suggests snuff could be a valuable tool to help smokers help themselves. 7 It's true that they'd do well to swear off the weed in any form. But when virtue fails, as it often does, we have to look for ways to make vice less dangerous. That's the rationale for giving teens access to condoms and other types of birth control, even if we strongly prefer that they abstain from sex. It's also the idea behind needle-exchange programs, which recognize that one thing worse than injecting heroin is injecting it with an AIDS-infected syringe. 8 Smokeless tobacco offers hope to hard-core smokers because it lets them fill their nicotine needs without sucking toxic fumes into their lungs. Addicts would be better off getting their daily dose without lighting up. 9 The rest of us would gain as well, since this indulgence lacks a notable byproduct of cigarettes: secondhand smoke. (With some forms, the user doesn't even have to spit. ) And nobody ever burned down his house by falling asleep while dipping snuff. 10 You may wonder why any smoker wouldn't use nicotine gum or patches instead. Answer: because they're more expensive and less potent, relieving smokers of their cash but not their cravings. While nicotine maintenance works for some people, it doesn't work for others, and they shouldn't be deprived of additional options. 11 Critics dismiss Rodu as a hired gun for the smokeless tobacco industry, which in recent years has donated money to support his research and would like to market its product as a safer alternative to smoking. But he says his studies between 1993 and 1999 were done without any industry financing. The funds the industry has given since then have been unrestricted grants to the University of Alabama at Birmingham, and it has no control over the research. 1
A.
Quite a big percentage of Americans are cigarette smokers.
B.
Americans are well informed of the danger from smoking.
C.
Smokers of cigarettes may die of cancer.
D.
The campaign against smoking succeeds in preventing Americans from smoking.
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【单选题】成年人普通感冒最常见的病原体是( )
A.
鼻病毒
B.
埃可病毒
C.
柯萨奇病毒
D.
呼吸道合胞病毒
E.
副流感病毒
【简答题】健美操基本步伐根据人体运动时对地面的冲击力大小分为无冲击力、 和 三大类。
【单选题】平衡结晶时,在Fe-Fe 3 C相图ECF线上发生的反应是( )。
A.
,As→Fe 3 C
B.
,L
C.
→A E `+Fe 3 C C,A E +Fe 3 C→L C `
D.
, L→Fe 3 C1
【多选题】用沉淀重量法测定铁盐(Ⅲ)药物时,需要( )。
A.
Fe(OH)3·nH20
B.
2Fe/Fe203
C.
Fe203
D.
Fe/Fe203
E.
换算因数
【多选题】下列关于行政法的特点说法正确的是
A.
行政法是调整行政关系的法
B.
行政法对行政权有规范和控制作用,因此古代不存在我们今天所说意义上的行政法
C.
行政法无法形成法律规范性文件
D.
行政法调整的社会关系比宪法调整的社会关系要广
【单选题】下列关于行政法律关系与行政关系的表述中不正确的是( )。
A.
行政法律关系不同于行政关系
B.
行政关系是行政法调整的对象,而行政法律关系是行政法调整的结果
C.
行政法并不对所有行政关系作出规定或调整,只调整其主要部分
D.
行政法律关系范围比行政关系小且其内容层次较低
【单选题】下列关于行政法的表述不正确的有()。
A.
行政法是调整社会组织内部行政关系的法
B.
行政法是规范和控制行政权力的法
C.
行政法的法源形式众多
D.
行政法没有统一的法典
【简答题】25℃时,溶液中含有Fe 3+ 、Fe 2+ ,它们浓度都是0.05mol·dm -3 ,如果要求Fe(OH) 3 沉淀完全,而Fe 2+ 不生成Fe(OH) 2 沉淀,试问溶液的pH应控制为多少?
【单选题】已知25℃时,电极反应 (1)Fe 2+ +2e - ====Fe(s)的标准电极电势 =-0.439V (2)Fe 3+ +e - ====Fe 2+ 的标准电极电势 =0.770V (3)Fe 3+ +3e - ====Fe(s)所对应电极的标准电极电势 {Fe 3+ |Fe(s)}=(    )。
A.
0.331V    
B.
-0.036V    
C.
-0.331V    
D.
0.036V
【单选题】政府定价是指由政府价格主管部门或者其他有关部门,按照定价权限和范围规定基准价及其浮动幅度,指导经营制定的价格。对于实行政府指导价的房地产,由于经营者应在政府指导价规定的幅度内制定价格,所以,估价结果不得超出政府指导价规定的幅度。( )
A.
正确
B.
错误
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