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发布时间:2023-09-28 00:53:07

[单项选择]A newly published AIDS study could open another front in the battle against HIV infection by showing that gene therapy can be used to stop infected cells from spreading the deadly virus, researchers said.
In a test-tube experiment believed to be the first of its kind, researchers based at Children’s Hospital of Philadelphia were able to block the operation of the "tat" gene that allows HIV to spread throughout the body from infected cells.
Up to now, genetic AIDS research has concentrated on finding ways to help healthy cells withstand the ravages of the HIV virus that infects an estimated 16,000 new victims a day, mainly in the developing world.
But by working with human cells already infected with HIV, the team was able to reduce the tat gene’s virus-replicating functions by 80 percent to 90 percent, according to findings published in the journal Gene Therapy.
That, researchers said, raises the possibility of a new gene therapy approach capable of suppleme
A. AIDS study raises hopes for gene therapy treatment.
B. A new killer of HIV virus.
C. Research on gene therapy.
D. Gene therapy proves to be the ultimate solution to HIV infection.

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[单项选择]A newly published AIDS study could open another front in the battle against HIV infection by showing that gene therapy can be used to stop infected cells from spreading the deadly virus, researchers said.
In a test-tube experiment believed to be the first of its kind, researchers based at Children’s Hospital of Philadelphia were able to block the operation of the "tat" gene that allows HIV to spread throughout the body from infected cells.
Up to now, genetic AIDS research has concentrated on finding ways to help healthy cells withstand the ravages of the HIV virus that infects an estimated 16,000 new victims a day, mainly in the developing world.
But by working with human cells already infected with HIV, the team was able to reduce the tat gene’s virus-replicating functions by 80 percent to 90 percent, according to findings published in the journal Gene Therapy.
That, researchers said, raises the possibility of a new gene therapy approach capable of suppleme
A. helping healthy cells withstand the ravages of HIV virus
B. completely stopping the infected cells from spreading
C. considerably inhibiting the tat gene from working
D. isolating HIV virus from the healthy cells
[填空题]He expects an exotic study with freshwater worm from the Antarctic which can ______ to yield results which will help to understand how mirror-image twins develop.


[单项选择]Why has the AIDS study been named as 2011 Breakthrough of the Year by the journal Science( )
A. It finds that HPTN 052 can cure AIDS effectively.
B. It finds that antiretroviral drugs can considerably lower the risk of transmitting HIV.
C. It finds an effective way to stop the HIV transmission.
[名词解释]AIDS
[单项选择]I bought a new sweater in a newly-open clothes-market. But what a pity it was that the sweater ______when I washed it.
A. shrank
B. contracted
C. shortened
D. condensed
[单项选择]

Could HIV, the virus that causes AIDS, be weakening The results of a study conducted in Belgium, at the Institute of Tropical Medicine in Antwerp, seem to suggest that in one corner of the world it might be. The report, published in the latest issue of AIDS, a specialist journal, concludes that HIV’s ability to replicate (known technically as its virulence) may have decreased since the start of the pandemic. Kevin Aden, the lead author of the paper, stresses that the study is based on a small set of samples and does not prove that HIV’s virulence is attenuating around the world. However, it does offer new insights into the evolution of the disease.
Dr. Arien looked at 24 blood samples collected from untreated patients attending an HIV/ AIDS clinic in Antwerp. A dozen of these samples were taken between 1986 and 1989; the other 12 were collected between 2002 and 2003. First, he analyzed the samples to find their viral load (the number of virus particles per cub
A. weakening.
B. accentuating.
C. accelerating.
D. increasing.

[单项选择]With more study, we could identify ______.
A. objects within the wrappings
B. Nesperennub’s age
C. his face
D. A, B and C
[单项选择] AIDS AIDS is Acquired Immune Deficiency Syndrome. The human immunodeficiency virus (人类免疫缺损病毒)called HIV is believed to cause AIDS. There is no cure. People who get the disease will die. AIDS itself does not kill. However, it attacks and destroys the body’’s defense system that fights against infection. When this happens, a person has little ability to fight off many other diseases including pneumonia(肺炎), cancer and tuberculosis (结核病). A new study says the number of women in the United States with AIDS has increased sharply. The study says AIDS is increasing faster among women than among men. Eighteen percent of AIDS patients are women. This is almost 3 times the rate 10 years ago. Most women get the AIDS virus from having sexual relations with men. Pregnant women with the disease can pass it to their babies. The effect of AIDS in America is greatest in large cities. AIDS is the leading cause of death among all people in 79 cities. It is th
A. A man with AIDS passes the disease to his wife.
B. A pregnant woman with AIDS passes it to her baby.
C. A doctor with AIDS passes the disease to his or her patients.
D. A person with AIDS passes it to another person who share needles with the former to pull illegal drugs into their blood.

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