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
考研
It took decades to prove that cigarette smoking causes cancer, heart disease, and early death. It took【C1】________years to estab
It took decades to prove that cigarette smoking causes cancer, heart disease, and early death. It took【C1】________years to estab
admin
2023-01-24
52
问题
It took decades to prove that cigarette smoking causes cancer, heart disease, and early death. It took【C1】________years to establish that secondhand smoke also kills. Now scientists are worried about another cigarette-related phenomenon: thirdhand smoke. It’s real, and it’s found everywhere. Without knowing it, indoor smokers have left a toxic【C2】________that continues years after their last cigarette was extinguished.
Researchers now know that thirdhand smoke combines with some substances to create new compounds. Thirdhand smoke【C3】________and settles with dust,【C4】________ down to carpeting and furniture【C5】________and makes its way deep into the material in paneling and wall. It【C6】________in the hair, skin, clothing, and fingernails of smokers—【C7】________a mother who doesn’t smoke【C8】________ her kids, smokes outside, then comes inside and holds the baby is exposing that child to thirdhand smoke. The new compounds are【C9】________to clean up, have a long life of their own, and many may cause cancer. And the contamination becomes more toxic【C10】________time.
No one knows, in this relatively new field of research, how long the compounds created by smoke and environmental pollutants last. "In homes where we know no smoker has lived for 20 years, we’ve still found【C11】________of these compounds in dust, in wallboard," says a scientist. But scientists do know that babies and children are most【C12】________to the toxic effects of thirdhand smoke. They【C13】________on rugs, fall asleep on carpets, and teethe on furniture, all of which could be【C14】________ with thirdhand smoke.
Researchers aren’t just worried about the risk of cancer. Thirdhand smoke could be【C15】________other health problems. Those who move into houses or apartments【C16】________owned by smokers might be exposed as well. And thirdhand smoke is difficult to【C17】________. It’s virtually impossible to remove this stuff【C18】________you remove the flooring and wall.
Experts say much more work needs to be done on the【C19】________of the problem, the health risks, and effective ways to clean up the compounds. They advise parents not to expose their children to thirdhand smoke, not to【C20】________hotel rooms or cars used by smokers.
【C18】
选项
A、unless
B、while
C、if
D、once
答案
A
解析
三手烟存在于各种地方,可见只有打掉地板和墙(remove the flooring and wall),才能清除三手烟。A项unless“除非”满足语义和逻辑要求。B项while“当……”表时间。C项if“如果”表因果。D项once“一旦”表条件。三项代入后均不符合句子逻辑。
转载请注明原文地址:https://kaotiyun.com/show/TWMD777K
0
考研英语二
相关试题推荐
Inthepast20yearsalone,threecoronaviruseshavecausedmajordiseaseoutbreaks.FirstcametheoriginalSARSvirusin2002.
Inthepast20yearsalone,threecoronaviruseshavecausedmajordiseaseoutbreaks.FirstcametheoriginalSARSvirusin2002.
Inthepast20yearsalone,threecoronaviruseshavecausedmajordiseaseoutbreaks.FirstcametheoriginalSARSvirusin2002.
Inthepast20yearsalone,threecoronaviruseshavecausedmajordiseaseoutbreaks.FirstcametheoriginalSARSvirusin2002.
Inthepast20yearsalone,threecoronaviruseshavecausedmajordiseaseoutbreaks.FirstcametheoriginalSARSvirusin2002.
Inthepast20yearsalone,threecoronaviruseshavecausedmajordiseaseoutbreaks.FirstcametheoriginalSARSvirusin2002.
Inthepast20yearsalone,threecoronaviruseshavecausedmajordiseaseoutbreaks.FirstcametheoriginalSARSvirusin2002.
Inthepast20yearsalone,threecoronaviruseshavecausedmajordiseaseoutbreaks.FirstcametheoriginalSARSvirusin2002.
随机试题
使用显微镜时,动作要()。
否认思维和存在有同一性的哲学派别是( )。
自理能力训练最好在何处进行
实验室质量管理体系文件自发布后,至少运行()个月,才能进行计量认证评审。
已知空间有两个点M、N,它们的坐标为M(a,a,a,)、N(b,b,b,)。则:M、N距原点的远近表述正确的是();
在某工程网络计划中,已知工作M的总时差和自由时差分别为7天和4天,监理工程师检查实际进度时,发现该工作的持续时间延长了5天,说明此时工作M的实际进度将其紧后工作的最早开始时间推迟( )。
建设工程竣工验收应具备的条件有()。
事业单位登记管理是一种()行为。
【B1】【B10】
Officials______apressconferenceassoonasmoreinformationaboutthecaptureofthesuspectedcriminalscanbegathered.
最新回复
(
0
)