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【单选题】
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.
A.
aged
B.
aging
C.
age
D.
ages
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参考答案:
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【简答题】Ⅰ.测定亚硝酸盐含量时要配制标准显色液,即吸取0.20mL、0.40mL、0.60mL、0.80mL、1.00mL和1.50mL亚硝酸钠,分别置于50mL比色管中,再另取1支空比色管。向各管中分别加入2.0mL对氨基苯磺酸,混匀,静置3~5min后,加入1.0mLN-1-萘基乙二胺盐酸盐溶液,最后加蒸馏水补足50mL。 Ⅱ.用样品处理液代替亚硝酸钠溶液做一个50mL的样品比色管,15min后与标准...
【单选题】The board of directors at River plc,a large multi national online retailer, are debating whether to introduce a new technology aimed at making the lives of its customers easier. It has been proposed t...
A.
Big data
B.
Cloud computing
C.
Artificial intelligence
D.
Automation
【单选题】下列关于测定亚硝酸盐含量实验操作的叙述,正确的是
A.
在盐酸酸化条件下,亚硝酸盐与对氨基苯磺酸发生重氮化反应形成玫瑰红色染料
B.
制备的标准显色液中亚硝酸钠含量最少是 1 微克
C.
制备样品处理液,加入氢氧化铝乳液的目的是除去色素等杂质,得到澄清溶液
D.
泡菜腌制时间长短会影响亚硝酸盐含量,但温度和食盐的量用不影响其含量
【简答题】名词解释:迟滞
【单选题】Which is not the item that Will likes?
A.
watching films
B.
getting a shave
C.
listening to jazz music
【单选题】It can be inferred from the news item that______.
A.
the whole bill will not go into effect immediately
B.
the bill will cost a great sum of money
C.
people from all walks of life agree with the bill
D.
children under 26 can stay on his parents' health insurance
【单选题】The nurse has provided instructions to a pregnant client who is preparing to take iron supplements. The nurse determines that the client understands the instructions if she states that she will take t...
A.
Tea
B.
Milk
C.
Coffee
D.
Orange juice
【单选题】测定实验中,加入氨磺酸钠的作用是
A.
掩蔽剂
B.
显色剂
C.
缓冲剂
D.
脱硫剂
【单选题】The nurse is reviewing a nutritional plan of care with a pregnant client and is identifying the food items highest in folic acid. The nurse determines that the client understands the foods that supply...
A.
Milk
B.
Yogurt
C.
Bananas
D.
Leafy green vegetables
【多选题】《谷梁传》中“交讥之”的含义是()。
A.
讥周天子
B.
讥齐国
C.
讥鲁国
D.
讥诸侯
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