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男，24岁，一年来头晕，乏力，心悸，经常鼻出血、牙龈出血。体查：贫血状，皮肤有淤点，肝、脾不大。血象：Hb
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Giving Up Smoking
A number of devices are available to help a person quit smoking. Nicotine (尼古丁) patches are small, nicotine-containing adhesive (粘着的) discs applied to the skin. The nicotine is slowly absorbed through the skin and enters the bloodstream (血流). Over time, the nicotine dose is reduced and eventually the desire for nicotine is eased. Nicotine gum (口香糖) works in a similar manner, providing small doses of nicotine when chewed (咀嚼).
The benefits of giving up smoking include the immediate reduction of harm to the health of the smoker and easier admission to social activities and institutions that ban smoking. In a 1988 report, the U.S. Surgeon General declared cigarette smoking to be more harmful and expensive than tile use of cocaine (可卡因), alcohol, or heroin. Recent evidence supports this claim.
The United States government has collected a special tax on cigarettes for several decades. The rate rose from 8 cents per pack of 20 cigarettes in 1951 to 24 cents per pack in 1993. In other developed countries, the cigarette tax rate is much higher, ranging from 50 percent in Switzerland to 85 percent in Denmark.
In the United States, the first direct action to check smoking was the regulation of a warning on cigarette packages by the Federal Trade Commission. This warning took effect in 1964 and was strengthened in 1969 to read: "Warning: The Surgeon General Has Determined That Cigarette Smoking Is Dangerous to Your Health." In 1971 all cigarette advertising was banned from radio and television, and cities and states passed laws requiring nonsmoking sections in public places and workplaces.
Which of the following can help a person quit smoking？
现代企业中的委托—代理问题是由于信息不对称所导致的。()
图所示桁架中杆12的内力N12为()。
A公司对外负债130万元，另有30万元的货款未予追回(欠款人为D公司)。20印年3月A公司经全体股东同意分立为B、C两个公司，由B承受A公司的全部债权债务，并办理变更登记与公告。同年4月，B、C签订协议，约定A公司对D公司的30万元债权由C享有。同年5月，C向法院起诉D，要求归还30万元货款。有关该案的正确表述是下列哪项？()
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