SQL语言又称为______。A．结构化定义语言 B．结构化控制语言 C．结构化查询

B公司为增值税一般纳税人企业，增值税税率17%，甲公司为小规模纳税企业，征收率为6%。B公司以一台生产设备换入甲公司的一批商品。生产设备的账面原价为700万元，已计提折旧72万元，已计提减值准备20万元，其公允价值为600万元。换入的商品在甲公司的账面成本为660万元，不含增值税的公允价值和计税价格为566.04万元。在运回货物过程中，B公司用银行存款支付运费2万元，B公司收到货物，并取得了甲公司由税务局代开的增值税专用发票。假设该交换具有商业实质，不考虑运费的增值税抵扣和换出设备的增值税。则B公司换入商品的入账价值是( )万元。

A．579.34
B．559.34
C．568.04
D．505.77

调车指挥人不需要向司机亲自交递调车作业计划。

影响问题解决的主要因素是什么？

在消费者意志过程中包含（）、（）和（）三个基本特征。

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.

3（）

A.studies

B.researches

C.surveys

D.examines