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【单选题】
以下不属于有机氮的是A.
蛋白质
B.
氨基酸
C.
氨氮
D.
有机胺
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举一反三
【单选题】Drug use among teens concerns many people in California. Advocates of the 'Stop Drugs Now' program, which was piloted in public schools in five California counties last year, argue that the program sh...
A.
School programs are far less important than parental messages in influencing a teenager's decision to use drugs.
B.
Drug use among teens in the five counties where the 'Stop Drugs Now' program was piloted has been dropping steadily for over a decade.
C.
Teenagers at the public schools where the 'Stop Drugs Now' program was piloted reported higher average levels of drug use than did teenagers at private schools in the same counties where the program was not piloted.
D.
There is evidence that teenagers who start smoking at an early age are more likely to experiment with illegal drugs than teenagers who do not smoke.
E.
The percentage of teenagers who reported using drugs at the schools where the 'Stop Drugs Now' program was piloted dropped more in the last year than in any other year over the last decade.
【单选题】What a shame that there are so many people there, but ______ dare stop the crime(违法、犯罪行为).
A.
all
B.
neither
C.
both
D.
none
【简答题】案例中老师举办的诚信班会都有哪些环节?
【单选题】— People should stop using so many private cars and start using public transport. — ____. The roads are too crowded now. [ ]
A.
Fine
B.
Go ahead
C.
Exactly
D.
That's all right.
【简答题】1800年代, 制成了人类历史上最早的电池,后人称之为伏特电池。
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