首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、They are powered by battery. B、They don’t deliver nicotine. C、They don’t look like cigarettes. D、They will soon be on the mark
A、They are powered by battery. B、They don’t deliver nicotine. C、They don’t look like cigarettes. D、They will soon be on the mark
admin
2021-11-26
71
问题
Good morning. Today I’d like to talk about electronic cigarettes. [22] Electronic cigarettes are battery-operated devices designed to deliver nicotine with flavorings and other chemicals to users in vapor instead of smoke. They can be manufactured to resemble traditional tobacco cigarettes, cigars or pipes, or even everyday items like pens or USB memory sticks; newer devices, such as those with tillable tanks, may look different. More than 260 different e-cigarette brands are currently on the market. While e-cigarettes are often promoted as safer alternatives to traditional cigarettes, which deliver nicotine by burning tobacco, little is actually known yet about the health risks of using these devices.
[23] Cigarette smoking remains the leading preventable cause of sickness and mortality, responsible for over 400,000 deaths in the United States each year. E-cigarettes are designed to simulate the act of tobacco smoking by producing something that looks and feels like tobacco smoke and delivers nicotine but with less of the toxic chemicals produced by burning tobacco leaves. [24] Because they deliver nicotine without burning tobacco, e-cigarettes appear as if they may be a safer, less toxic alternative to conventional cigarettes. Although they do not produce tobacco smoke, e-cigarettes still contain nicotine and other potentially harmful chemicals. Nicotine is a highly addictive drug, and recent research suggests nicotine exposure may also prime the brain to become addicted to other substances. Also, testing of some e-cigarette products found the vapor to contain toxic chemicals. The health consequences of repeated exposure to these chemicals are not yet clear.
Some people believe e-cigarette products may help smokers lower nicotine addiction while they are trying to discontinue their tobacco use. However, at this point it is unclear whether e-cigarettes may be effective as smoking-cessation aids. There is also the possibility that they could perpetuate the nicotine addiction and thus interfere with quitting.
[25] Because e-cigarettes are not currently marketed either as tobacco products or as devices having a therapeutic purpose, they are not regulated by the FDA. In addition, there is currently no regulation of the liquids that are used in e-cigarettes. So, there are no accepted measures to confirm their purity or safety.
22. What do we learn about e-cigarettes?
23. How many deaths are caused by cigarette smoking in the US every year?
24. Why do e-cigarettes appear to be safer than conventional cigarettes?
25. Why are e-cigarettes not regulated by the FDA?
选项
A、They are powered by battery.
B、They don’t deliver nicotine.
C、They don’t look like cigarettes.
D、They will soon be on the market.
答案
A
解析
录音提到电子香烟是用电池做电源的,故选A项。录音提到电子香烟以水蒸气而非烟雾的形式给人们传递了尼古丁及其他化学物质,故B项“电子香烟不会传递尼古丁”不正确。在外形上电子香烟可以做成传统的香烟、雪茄或者烟管的形状,也可以做成日常生活用品的造型,因此C项“电子香烟看起来不像传统香烟”过于绝对。目前市场上已有250多种不同品牌的电子香烟,故D项“电子香烟即将上市”不正确。
转载请注明原文地址:https://kaotiyun.com/show/HHx7777K
0
大学英语六级
相关试题推荐
A、Importingallkindsofgoodsovertheyears.B、MakingtradesbetweenChinaandItaly.C、Exchangingfurnitureforfoods.D、Usin
A、Howathletesexcelinthepasttwentyyears.B、Howathleteshavechallengedtheirphysicalabilities.C、Howcomparisonsarema
America’seducationsystemhasbecomelessaladderofopportunitythanastructuretotransmitinequalityfromonegenerationt
A、Travelingalloverthecountry.B、Drivingfromonecitytoanother.C、Thedetailsinthedrivingsimulator.D、Thekeyroleof
HowTelemedicineIsTransformingHealthcareA)Afteryearsofbigpromises,telemedicineisfinallylivinguptoitspotentia
SurfingtheInternetduringclassdoesn’tjuststealfocusfromtheeducator:italsohurtsstudentswho’realreadystruggling
Schoolsarenotjustamicrocosm(缩影)ofsociety;theymediateittoo.Thebestseektoalleviatetheexternalpressuresonthei
Ourworldnowmovessofastthatweseldomstoptoseejusthowfarwehavecomeinjustafewyears.ThelatestiPhone6s,for
Overall,menaremorelikelythanwomentomakeexcuses.Severalstudiessuggestthatmenfeeltheneedtoappearcompetentina
A、Apeacefulsetting.B、Aspaciousroom.C、Tobeintherightmood.D、Tobeentirelyalone.D随后女士问到:设计情节时,你需要独处吗?男士语气肯定,使用重复来强调
随机试题
A.尿蛋白(+),白细胞(+++),血压正常,血补体正常B.尿蛋白(+++),血总蛋白降低,白蛋白降低,胆固醇增高,血压正常C.尿蛋白(+),红细胞(++),血压增高,血补体降低D.尿红细胞(+++),血压增高,血尿素氮明显降低,少尿持续10天以上
低钾血症时静脉输液补钾速度每小时一般不超过()
人类体细胞具有多少对染色体
慢性浅表性胃炎的病理特点
《证券公司监督管理条例》规定,任何单位或个人可以非因客户本身的债务,对客户的交易结算资金、委托资产申请查封、冻结或者强制执行;动用客户的交易结算资金、委托资金。()
企业效益提高,对全体员工给予等比例奖励的工资调整方法是()。
我国第一部马克思主义教育学著作是()
现在甲工厂生产某商品,年销售量为100万件,每批生产需要增加准备费1000元,而每件商品的年库存费为0.05元.如果销售率是均匀的,且上一批售完,立即生产下一批,每批数量相同,问全年应组织几批生产使得生产准备费与库存费用之和为最小.
Someexpressionshavemadeajumpfromsportseventstoeverydaylife.Onesuchexpressionisfallguy.Afallguyistheperson
DearSir,Muchtomyregret,Iwritethislettertocomplainaboutyourcompany’sbaddeliveryservice.Thelaptop(model
最新回复
(
0
)