There is a trend that drugs are more readily available and used by youth at a younger age than ever before. Hair______is probab

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问题 There is a trend that drugs are more readily available and used by youth at a younger age than ever before.
Hair______is probably the friendliest drug testing a person will ever take.

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答案analysis

解析 第十三段的开头有一段话可以告诉我们正确答案:For most parents and teenagers,hair analysis is less intrusive and embarrassing than urinalysis. "It’s probably the friendliest drug test a person will ever take."
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