1.解析: 词义猜测题。画线短语前面提到“Many people believe that tension and stress can cause your hair to lose its color”,即许多人相信紧张和压力导致头发褪色变白。短文接着谈到“In fact,it is...”,这是推测画线词意思的关键。因此an old wives’ tale意为“无稽之谈”。
答案: B
2.解析: 主旨大意题。第二段第一句话是该段的主题句。从中可以看出,人体的每一部分都会随着年龄的增长而衰老。
答案: D
3.解析: 细节理解题。本文第三段提到“At first,hairs will have a limited amount of pigment and they will appear to be grayish in color.In time,they will lose all of their pigment and will be white.Many things are known to cause graying,and genetics is a very powerful factor.”由此可以看出,色素和基因在头发变白的过程中起着重要的作用。
答案: C
4.解析: 细节理解题。本文倒数第二段提到“Constant worry and tension can have many harmful effects on the human body.It is a known fact that stressful times can cause one to suffer hair loss”。由此可知,持续的压力会导致脱发。
答案: D
5.解析: 推理判断题。本文倒数第二段最后提到“However,there is no sound evidence to support this.”最后一段也提到“There is no scientific evidence to support the theory...”。由此可知,是否压力会引起头发变白仍无定论。
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