职称英语考试试题综合类a级测试题一:阅读理解_中大网校
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职称英语考试试题综合类a级测试题一:阅读理解

发表时间:2018/1/11 11:24:44 来源:互联网 点击关注微信:关注中大网校微信

Study Says Dogs Can Smell Cancer

Dogs are known for their sense of smell. They can find missing people and things like bombs and illegal drugs. Now a study suggests that the animal known as man’s best friend can even find bladder (膀胱) cancer.

Cancer cells are thought to produce chemicals with unusual odors (气味). Researchers think dogs have the ability to smell these odors, even in very small amounts, in urine (尿). The sense of smell in dogs is thousands of times better than in humans.

The study follows reports of cases where, for example, a dog showed great interest in a growth on the leg of its owner. The mole (痣) was later found to be skin cancer.

Carolyn Willis led a team of researchers at Amersham Hospital in England. They trained different kinds of dogs for the experiment. The study involved urine collected from bladder cancer patients, from people with other diseases and from healthy people.

Each dog was tested eight times. In each test there were seven samples for the dogs to smell. The dog was supposed to signal the one from a bladder cancer patient by lying down next to it.

Two cocker spaniels (短腿长毛垂耳小猎犬) were correct fifty-six percent of the time. But the scientists reported an average success rate of forty-one percent.

As a group, the study found that the dogs chose the correct sample twenty-two out of fifty-four times. That is almost three times more often than would be expected by chance alone.

The British Medical Journal published the research. In all, thirty-six bladder cancer patients and one hundred and eight other people took part.

During training, all the dogs reportedly even identified a cancer in a person who had tested healthy before the study. Doctors found a growth on the person’s right kidney (肾).

Bladder cancer is the ninth most common cancer worldwide. The International Agency for Research on Cancer says this disease kills more than one hundred thousand people each year. Doctors say cigarette smoking is the leading cause of bladder cancer.

36.The experiment was conducted in a

A.private home.

B.training school.

C.hospital.

D.police station.

.正确答案:C

.37.The dogs’ average success rate was

A.56%.

B.41%.

C.22%.

D.54%.

.正确答案:B

.38.Participants in the experiment were

A.36 bladder cancer patients.

B.144 cancer patients.

C.108 healthy people.

D.144 sick and healthy people.

.正确答案:D

.39.The person who had tested healthy before the study

A.dropped out.

B.passed away.

C.was found to have cancer.

D.was found to remain healthy.

.正确答案:C

.40.Which is NOT true of bladder cancer?

A.It is the 9th most common cancer worldwide.

B.It can be identified only by dogs.

C.It kills more than 100,000 people each year.

D.It is mainly caused by smoking.

.正确答案:B

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报考选择:职称英语报考科目|级别选择|报名条件及相关问题解答

免考规定:取得外语(从事翻译工作人员及外语教师第二外语)专业专科及以上学历的人员申报中、高级职称评审……。【查看详情

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