4. methadone:美沙酮,一种有效的合成麻醉药,它不像口马啡或海洛因那样容易汁人上瘾,在戒毒治疗中被用作这些毒品的替代品。
1. According to the first two paragraphs,the author thinks that
B to reduce carbon emissions is all impossible mission.
D actions suggested by scientists will never be realized.
A know what they are doing.
C think the problem has been solved.
3. What does Stephen Schneider say about a heroin addict and methadone?
B Methadone is not a correct way to treat a heroin addict.
D Methadone and heroin are equally effective in treating a heroin addict.
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