单选题{{B}}Directions:{{/B}}There are 5 reading passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C, and D. You should decide on the best choice and mark your answer on the ANSWER SHEET by blackening the corresponding letter in the brackets. For years, doctors have given cancer patients three main treatments: surgery, radiation and chemotherapy. Now researchers are developing a fourth weapon: the patient's own immune system. New vaccines and drugs can stimulate the production of an army of cells and antibodies that kill cancer cells. Drug-vaccine therapy may lie lifesaver for Deerfield man. Few people survive advanced melanoma, but immune therapy is giving Deerfield resident Douglas Parker a fighting chance. The 46-year-old salesman noticed a mole on his chest three and a half years ago that was found to be cancerous. Doctors removed the mole but didn't get all of the cancer. The cancer spread to other parts of his body, including his liver, where a tumor grew as large as a baseball. Parker took interferon and interleukin-2 to boost his immune system's ability to fight the cancer. The tumor shrank but didn't disappear. In August, 1997, surgeons removed it, along with two thirds of his liver. Last January, doctors discovered a new tumor on Parker's left adrenal gland. He received an experimental cancer vaccine at the University of Chicago Hospitals, but the vaccine didn't stop the cancer from spreading to his right adrenal gland. To augment the vaccine, doctors at Lutheran General Hospital gave Parker a new round of intcrleukin-2 and interferon. The drug-vaccine combination has shrunk the tumors. And while it's too early to pronounce Parker cured, immune therapy may save his life. "I want to do this to help myself as well as other people who have melanoma," he said. Immune therapy "ultimately will be a significant change in the way we treat a lot of different cancers," said Dr. Jon Richards of Lutheran General Hospital in Park Ridge, who is testing cancer vaccines on melanoma patients. "It will be an equal partner with the other three treatments in the next five to ten years." Several drugs that bolster the immune system have been approved, and vaccines are being tested in dozens of clinical trials, including several in the Chicago area. Many of the experimental vaccines have been tested on patients with advanced melanoma who have little chance of surviving with conventional treatments alone. Researchers also have begun doing work that could lead to vaccines to treat prostate, lung, colon and other cancers. Immune therapy alone won't cure cancer. But when used after conventional treatments, it could kill cancer cells that survive surgery, radiation or chemotherapy, researchers said. Some day, vaccines also might be able to prevent certain cancers. It may be possible to vaccinate against viruses and bacteria that help cause cervical, liver and stomach cancers, the National Cancer Institute said.

单选题Some one has said that a man's history begins about one hundred and fifty years before his birth, or words ______.

单选题Antiwar champion Rep. John Murtha wants to attach conditions on the impending supplemental bill to fund the war______

单选题Malaria is an infectious parasitic disease that can be either acute or chronic and is frequently A.repeating B.terminal C.debilitating D.recurrent

单选题Biology may not be destiny, but genes apparently have a far greater influence on human behavior than is commonly thought. Similarities ranging from phobias to hobbies to bodily gestures are being found in pairs of twins separated at birth. Professor Bouchard of the University of Minnesota reports that so far, exhaustive psychological tests and questionnaires have been completed with approximately 50 pairs of identical twins reared apart, 25 pairs of fraternal twins reared apart, and comparison groups of twins reared together. Studies show that twins rend to have similar mannerisms, gestures, speed and tempo in talking, habits and jokes. Many of the twins dressed in similar fashion. One pair had practically the same items in the toilet cases, including the same brand of cologne and a Swedish brand of toothpaste. Twins also tend to have similar hobbies and interests—a male pair had similar workshops in their basements and a female pair had strikingly similar kitchen arrangements. Bouchard doesn't have enough information on abnormal behavior or psychopathology to make generalizations, but he has found repeated similarities. One pair of women were both very superstitious; another pair would burst into tears at the drop of a hat, and questioning revealed that both had done so since childhood. Overall the emerging findings of the study constitute a powerful rebuttal to those who maintain that environmental influences are primary shaping forces of personality. The textbooks are going to have to be rewritten, Bouchard predicts.

单选题Two-thirds of the U.S. basketball players are black, and the number would be greater______.the continuing practice of picking white bench warmers for the sake of bal ance. A. was it not because of B. had it not been for C. were it not for D. would it not have been for

单选题This is a market in which enterprising businesses ______ for the demands of teenagers and older youths in all their rock mania and pop-art forms. A. cater B. entitle C. appeal D. subject

单选题Which of the following is not mentioned in the passage?

单选题The transgenic farm animals mentioned in this passage are ______.

单选题Hong Kong was not a target for terror attacks, the Government insisted yesterday, as the US ______ closed for an apparent security review.

单选题This is a very big hotel and it can ______more than 1,000 people.(2011年南京师范大学考博试题)

单选题These people actively try to______ what they believe to be bad English and assiduously cultivate what they hope to be good English.(2004年中国社会科学院考博试题)

单选题It was so (disgusted), and (somewhat hazardous), (not to mention) a huge hassle and (monetary expense).

单选题We need one hundred more signatures before we take the ______ to the governor. A. plea B. petition C. patent D. claim

单选题Make up your mind that whatever the short-term temptations may be, you will never ______ from the highest standards of honor. A. deviate B. escape C. derive D. refrain