1.解析: 细节理解题。根据文章第一段第三句中的“cell phones are very popular with young people”可知,A项表述正确;根据最后一段倒数第三句中的“be very useful and convenient”可知,B、C两项表述正确;D项文中未提及。
答案: D
2.解析: 词义猜测题。根据语境可知,画线词所在句子的句意为:通过现代扫描仪器扫描,可以探测一些大脑和头部组织发生变化的信号。
答案: A
3.解析: 细节理解题。根据文章第三段第三、四句“In one case,a traveling salesman had to retire at a young age because of serious memory loss.He couldn’t remember even simple tasks.”可知,答案B符合文意。
答案: B
4.解析: 细节理解题。根据文章第四段最后一句“Mobile phone companies agree that there is some radiation,but they say the amount is too small to worry about.”可知,答案C符合文意。
答案: C
5.解析: 写作意图题。根据文章最后一段第一句“As the discussion about their safety continues,it appears that it’s best to use mobile phones less often.”可知,作者建议人们尽量少用手机。
答案: B阅读下列材料,从每题所给的选项中选出最佳选项。SHANGHAI—Health experts in Shanghai are calling for more protection for young children as the latest research shows about half of the youngsters are suffering from secondhand smoke.About 45 percent of children suffer passive smoking in families,50
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