Cancer is a leading cause of death around the world. When it comes to cancer, the sooner you know yo
英语试题 08-14
Cancer is a leading cause of death around the world. When it comes to cancer, the sooner you know you have it, the better your chances of surviving. A new blood test could change the way doctors and researchers find cancer in patients. Researchers say the test could provide evidence to the early forms of the disease.
Scientists at Swansea University in Wales came up with the idea. Gareth Jenkins is a professor at the university. “ In this blood test we don’t measure the presence of cancer; we measure the presence of mutant red blood cells which are collateral(附属的) damage that occurs---a by-product of the cancer developing.”
The researchers used normal laboratory equipment to perform the test. This equipment looks for changes in the structure of millions of red blood cells. Those mutant cells lack a surface protein that healthy cells normally have. “The main purpose of the test is to look for very rare cells which have picked up a mutation. The number of mutant red blood cells in a healthy person is around 5 or so per million. You have to look at millions of red blood cells to detect those rare events. These numbers increase in cancer patients---they go up to 40 or 50 mutants on average.”
The researchers tested blood from about 300 people, all of whom have cancer of the esophagus(食道). Patients with esophageal cancer have high levels of mutant red blood cells. Jenkins says that at this point he is not sure if other cancers will produce similar results.
The hope is that the new test and other non-invasive methods could one day become part of commonly used medical methods. He says that using a battery, or series, of tests will be the best way to find out if a person has cancer. These new technologies could save millions of lives.
28. According to the test, how do scientists find out if a person has cancer?
A. By calculating the speed of changes in the structure.
B. By observing the surface protein.
C. By looking for changes in the number of mutant red blood cells.
D. By measuring the presence of cancer.
29. What does the underlined word “mutant” in the 3rd paragraph mean?
A. Decreased. B. Changed. C. Increased. D. Multiplied.
30. The author adopts a/an tone in the passage.
A. humorous B. favorable C. critical D. objective
31. In which section of a website can you most probably find the passage?
A. Health. B. Fashion. C. Education. D. Culture.
【答案】
Scientists at Swansea University in Wales came up with the idea. Gareth Jenkins is a professor at the university. “ In this blood test we don’t measure the presence of cancer; we measure the presence of mutant red blood cells which are collateral(附属的) damage that occurs---a by-product of the cancer developing.”
The researchers used normal laboratory equipment to perform the test. This equipment looks for changes in the structure of millions of red blood cells. Those mutant cells lack a surface protein that healthy cells normally have. “The main purpose of the test is to look for very rare cells which have picked up a mutation. The number of mutant red blood cells in a healthy person is around 5 or so per million. You have to look at millions of red blood cells to detect those rare events. These numbers increase in cancer patients---they go up to 40 or 50 mutants on average.”
The researchers tested blood from about 300 people, all of whom have cancer of the esophagus(食道). Patients with esophageal cancer have high levels of mutant red blood cells. Jenkins says that at this point he is not sure if other cancers will produce similar results.
The hope is that the new test and other non-invasive methods could one day become part of commonly used medical methods. He says that using a battery, or series, of tests will be the best way to find out if a person has cancer. These new technologies could save millions of lives.
28. According to the test, how do scientists find out if a person has cancer?
A. By calculating the speed of changes in the structure.
B. By observing the surface protein.
C. By looking for changes in the number of mutant red blood cells.
D. By measuring the presence of cancer.
29. What does the underlined word “mutant” in the 3rd paragraph mean?
A. Decreased. B. Changed. C. Increased. D. Multiplied.
30. The author adopts a/an tone in the passage.
A. humorous B. favorable C. critical D. objective
31. In which section of a website can you most probably find the passage?
A. Health. B. Fashion. C. Education. D. Culture.
【答案】
苏19057182-3号