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  3. Electronic cigarettes are handheld nicotine-delivery devices that, despite a

Electronic cigarettes are handheld nicotine-delivery devices that, despite a

游客2024-03-30  64
问题     Electronic cigarettes are handheld nicotine-delivery devices that, despite a devoted following, are currently swirling in controversy. New York is pushing to become the first state to ban the devices, which so far remain【C1】______and mostly unstudied. With cute colors, fruity flavors, clever designs and other options, e-cigarettes may hold too much【C2】______for young people, critics warn, offering an easy gateway to nicotine addiction. But those criticisms clash with【C3】______strong arguments for the value of e-cigarettes. The devices, which are tobacco-free, may be a safer【C4】______to cigarettes, say advocates, who point to thousands of smokers who say they have used e-cigarettes to help them quit.
    Electronic cigarettes【C5】______use a rechargeable battery-operated heating element to vaporize the nicotine in a replaceable pipe. Nicotine is the substance in tobacco that people can become addicted to. Some e-cigarettes are made to look like real cigarettes, cigars or pipes. Others look like pens or USB memory devices. No tobacco is【C6】______in e-cigarettes and there is no smoke either. Instead, as users breathe in, they take in nicotine-filled vapor.
    By isolating nicotine, e-cigarettes should carry far fewer chemical risks than【C7】______cigarettes. Tobacco contains about 5,000【C8】______chemicals with as many as 100,000 more that haven’t yet been known. E-cigarettes【C9】______many of those ingredients. Researchers also found evidence that e-cigarettes reduce desires among smokers, not just for nicotine but also for the need to hold something in their hands and put something in their mouths. As a cigarette-quitting strategy, it’s not that the devices are good for anyone, but they are just better than what they’re meant to【C10】______
    A)alternative B)engaged C)regular D)opaque
    E)involved F)typically G)solely H)appeal
    I)momentum J)equally K)replace L)unregulated
    M)eliminate N)detect O)identified [br] 【C9】
选项
答案 M
解析 空格处填入动词原形作句子谓语。本段首句提到，电子香烟带来的化学危害比普通香烟少得多，再结合上一句对烟草化学成分的描述，可以推断电子香烟危害低是因为“去掉”了烟草中的许多化学成分，eliminate符合上下文语义。
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