医疗机构及其执行职务的人员发现传染病疫情应按规定和时限进行（）县级以上人民政府有关部

请写出个一个一元二次方程，使其中一根为x=2______．

修改病句。

1．闻声走出一个姑娘，可能大概是他的妹妹吧。

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2．桑娜和丈夫不但自己多受些苦，也要把西蒙的孩子抱回家中抚养。

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3．他宽厚地对我一笑，我忐忑不安的心才得以宁静。

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工作流程组织反映了一个组织系统中各项工作之间的逻辑关系，是一种( )。

A．静态关系

B．动态关系

C．组织关系

D．信息关系

1939年2月1日，中共代表李石锹，在横市组织成立湘中人民抗日工作委员会，地点在哪一个县？

Drug use is rising dramatically among the nation’ s youth after a decade of decline. From 1993 to 1994, marijuana use among young people (1) from 12 to 17 jumped 50 percent. One in five high school seniors (2) marijuana daily. Monitoring the Future, which (3) student drug use annually, reports that negative attitudes about drugs have declined for the fourth year in a row. (4) young people see great risk in using drugs. Mood-altering pharmaceutical drugs are (5) new popularity among young people. Ritalin, (6) as a diet pill in the 1970s and now used to (7) hyperactive children, has become a (8) drug on college campuses. A central nervous system (9) , Ritalin can cause strokes, hypertension, and seizures. Rohypnol, produced in Europe as a (10) tranquilizer, lowers inhibitions and suppresses short-term memory, which has led to some women being raped by men they are going out with. (11) taken with alcohol, its effects are greatly (12) . Rock singer Kurt Cobain collapsed from an (13) of Rohypnol and champagne a month before he committed (14) in 1994. In Florida and Texas, Rohypnol has become widely abused among teens, who see the drug as a less expensive (15) for marijuana and LSD. Alcohol and tobacco use is increasing among teenagers, (16) younger adolescents. Each year, more than one million teens become regular smokers, (17) they cannot legally purchase tobacco. By 12th grade, one in three students smokes. In 1995, one in five 14-year-olds reported smoking regularly, a 33 percent jump (18) 1991. Drinking among 14-year-olds climbed 50 percent from 1992 to 1994,and all teens reported substantial increases in (19) drinking. In 1995, one in five 10th graders reported having been drunk in the past 30 days. Two-thirds of high school seniors say they know a (20) with a drinking problem.

4（）

A.More

B.Many

C.Fewer

D.Few