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  3. There is a trend that drugs are more readily available and used by youth at a younger age than ever before. Using the RIAH tech

There is a trend that drugs are more readily available and used by youth at a younger age than ever before. Using the RIAH tech

admin2009-04-23  45
问题 There is a trend that drugs are more readily available and used by youth at a younger age than ever before.
Using the RIAH technique, it can be confirmed whether a person have used illegal drugs during the past four months.
选项 A、Y
B、N
C、NG
答案B
解析 在第十二段有这样一段话：Using a technique called radioimmunoassay of hair(RIAH)，the company can confirm if illegal drugs marijuana，cocaine，opiates(heroin)，methamphetamine，or PCP—have been used during the past three months．这段话告诉我们所给的论述是错误的。
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大学英语四级

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