题目内容
can also help to find lung and breast cancer, researchers report in integrative Cancer Therapies. The findings
show that trained ordinary household dogs can detect early-stage lung and breast cancers by smelling the
breath samples of patients.
Researchers have found that cancer cells send out molecules different from those of healthy ones, and that
might be sensed by smell by the highly sensitive dog's nose.
For the study, five dogs were trained by a professional instructor to respond differently to breath samples
of healthy and cancer patients. "The dogs learned to sit or lie down in front of cancer patient samples and to
ignore control samples through the method of food reward," McCulloch explained.
After a period of training,researchers tested the animals' ability to distinguish cancer patients from controls.
The animals were given breath samples from 55 patients with lung cancer, 31 with breast cancer and 83 healthy
controls who were not included in the original training period.
McCulloch's group found that the dogs were able to correctly distinguish the breath samples of cancer
patients from those of the control subjects in about 90 percent of the cases. The dogs were also able to
detecting early-stage lung and breast cancers.
"These results show that there is hope for early detection," McCulloch said. The re-searches are planning to
conduct further studies on the breath composition of cancer patients to possibly design an electronic device that
can do the dogs' job. "A dog's nose is so powerful it can detect odors (气味) 10 000 to 100 000 times better
than a human nose can. I hope people will be interested in doing this research," McCulloch added, "It shows
that there is definitely something out there."
B. 5 dogs and 86 people
C. 10 dogs and 83 people
D. 5 dogs and 169 people
B. to recognize differences of
C. to remember somebody forever
D. to discomfort somebody
B. the final goal of the researchers is to design an electronic dog to detect cancer
C. dogs can detect odors 10 000 to 100 000 times better than humans can
D. dogs will soon be widely used to smell signs of cancers in hospitals
B. Dogs and Cancer
C. Dogs Smell Signs of Cancer
D. McCulloch's New Discovery
天天向上一本好卷系列答案
小学生10分钟应用题系列答案阅读理解E
Do you have a sore throat, a running nose and a headache? Do you keep coughing and sneezing? If you do, the chances are that you have a cold or perhaps flu---but which one? Although both colds and flu are caused by viruses, they are very different illnesses.
Colds, which usually last about a week, affect the nose most. They commonly cause a running nose and sneezing. Sometimes, they cause a headache, a cough and slightly aching muscles.
Flu is a much more serious illness and is caused by different groups of viruses. People with flu usually get all the symptoms(症状) described above. However, they also get a high fever, a dry cough and much worse aching. Fever is one of the characteristic symptoms of the flu for all ages. The symptoms also last much longer. Sometimes they don’t disappear for at least two weeks.
Flu can be a deadly disease. The elderly(年长的), who are weaker and less healthy than most younger people, can die from flu. This is one reason why old people are advised to have a flu injection(预防针) before the start of winter when flu is most common. This injection is inexpensive and definitely（明显地）worth it.
If you have a cold or flu, you must always deal with used tissues(手巾纸) carefully. Don’t leave dirty tissues on your desk or on the floor. Someone else has to pick these up and viruses could be passed on. And finally, remember to cover your nose and mouth when you sneeze! You don’t want to see the small drops of liquids blown(喷) out of your nose and mouth when you sneeze, do you? Disgusting(令人作呕), eh? Now you can understand why it’s a good idea to cover your nose and mouth when you sneeze!
【小题1】 In paragraph 4, we learn that ________.
| A．flu injection can cause death |
| B．most old people die from flu |
| C．flu can kill old people easily |
| D．flu is most common in summer |
| A．it helps keep your classroom tidy |
| B．it prevents the spread of colds and flu |
| C．people hate picking up dirty tissues |
| D．picking up lots of tissues is hard work |
| A．Both colds and flu last the same time. |
| B．Both colds and flu can be prevented by injection. |
| C．Both colds and flu are caused by the same viruses. |
| D．Both colds and flu have an aching symptom. |
| A．Colds and Flu |
| B．The Different Symptoms of a Cold and Flu |
| C．Prevention Is Better Than Cure |
| D．Cover Your Nose and Mouth When Sneezing |
80 years." He said. "Some have suggested that there is no limit and that