Secondhand smoke isn’t just a health threat to people.It can also hurt dogs and cats,veterinarians say.
According to the Centers for Disease Control and Prevention,more than 126 million Americans who don't smoke are exposed to secondhand smoke in their homes,vehicles,workplaces,and public places.This exposure causes thousands of lung cancer and heart disease deaths among nonsmokers every year,according to the California Environmental Protection Agency.
“Making the leap from the effects of secondhand smoke on humans to their effects on pets isn't a big one,” says veterinarian (獸醫(yī)專家) Carolynn MacAllister of Oklahoma State University.
“There have been a number of scientific papers recently that have reported the significant health threat secondhand smoke poses to pets,” MacAllister said.“Secondhand smoke has been associated with oral cancer and lymphoma in cats,lung and nasal cancer in dogs,as well as lung cancer in birds.”
Studies have also shown that dogs living in a smoking household are susceptible to cancers of the nose and sinus area,particularly if they are a long-nosed breed,because their noses have a greater surface area that is exposed to carcinogens and a greater area for them to accumulate.Dogs affected with nasal cancer normally don't survive for more than one year.
“Short and medium-nosed dogs are more susceptible to lung cancer,because their shorter nasal passage aren't as effective at accumulating the inhaled secondhand smoke carcinogens,” MacAllister said.“This results in more carcinogens (致癌物質(zhì)) reaching the lungs.”
Birds are also at risk for lung cancer,as well as pneumonia,because their respiratory systems are hypersensitive to any type of air pollutant.
To help prevent animals from being adversely affected by smoking,pet owners who smoke should have a designated smoking area that is separated from the home or stop smoking altogether,MacAllister said.        
【小題1】From the passage,we can see secondhand smoke maybe not harmful to _______.

A.smokersB.non-smokersC.petsD.trees
【小題2】What can be suggested according to the passage?
A.Smokers can smoke anywhere.
B.Smokers can smoke at any time.
C.Smokers should smoke in the designated place.
D.Smokers must give up smoking at once.
【小題3】What kind of dogs are likely to suffer from nasal cancer?
A.Long-nosed dogsB.Short-nosed dogs
C.Medium-nosed dogsD.Dogs without noses
【小題4】The best title of the passage is __________.
A.Secondhand Smoke Causes Cancer in People
B.Secondhand Smoke Causes Cancer in Birds
C.Secondhand Smoke Causes Cancer in Pets
D.Secondhand Smoke Causes Cancer in Cats
【小題5】What is the meaning of the underlined phrase “are susceptible to”?
A.a(chǎn)re likely to be harmed by
B.a(chǎn)re hard to be influenced by
C.a(chǎn)re less to be effected by
D.a(chǎn)re lucky to be caught by


【小題1】D
【小題2】C
【小題3】A
【小題4】C
【小題5】A

解析【小題1】細(xì)節(jié)理解題。根據(jù)文章的第一段“Secondhand smoke isn't just a health threat to people.It can also hurt dogs and cats, veterinarians say.”可知二手煙的危害,但未提及樹。
【小題2】推理判斷題。ABD三個選項太絕對。C項是建議抽煙者在指定的地方吸煙。
【小題3】細(xì)節(jié)理解題。根據(jù)第五段可知長鼻子品種的狗易換這種癌癥。
【小題4】主旨大意題。這篇文章以狗為例著重講了二手煙對寵物的危害,
【小題5】詞義猜測題。BC中的hard和less與文章不符。利用帶入法A是正確的。

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If you watch British television on Friday March 15, you might be surprised to see celebrities wearing funny red noses and joking around. But don’t worry, they’re not mad, it’s all part of a biennial fund-raising event called Red Nose Day.
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