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问题 单项选择题 A1/A2型题

腹部最易损伤的空腔脏器是（）。

A.结肠

B.胃

C.小肠

D.直肠

E.十二指肠

答案

参考答案：C

解析：由于腹腔脏器不同的解剖特点，对损伤也有不同反应。肠管损伤中以小肠损伤多见，并且往往发生在空肠上段或回肠下端，因系膜短而固定，移动性小，故易受损伤。

单项选择题

甲上市公司2007年10月1日开始为某企业提供大型机械安装业务，安装期为10个月，合同总收入1000万元，至年底已预收款项400万元，实际发生成本300万元，估计至安装结束尚需发生成本500万元。在剩余的合同价款能可靠收回的情况下，甲上市公司2007年度该项安装业务应确认的劳务收入为( )万元。

A．300
B．375
C．400
D．500
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单项选择题

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.

10（）

A.valid

B.formal

C.popular

D.legal
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