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Electronic cigarettes are handheld nicotine-delivery devices that, despite a
Electronic cigarettes are handheld nicotine-delivery devices that, despite a
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2024-04-04
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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] 【C10】
选项
答案
K
解析
不定式标记to提示空格为动词原形。此句总结电子香烟并不完美,但至少比普通香烟好。句中they指“电子香烟”,句中比较关系表明what应指“普通香烟”,replace符合句意,指出电子香烟比它所要取代的香烟好。
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