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[单项选择]Promising Results from Cancer Study
A new experimental vaccine (疫苗) has shown promising results in the fight against lung cancer. In a small Texas-based study, a vaccine developed by scientists at Baylor University Medical Centre in Dallas, USA, cured lung cancer in some patients and slowed the progress of the disease in others.
Researchers have reported encouraging findings from this small study. Forty-three patients suffering from lung cancer were involved in these trials. Ten of these patients were in the early stages and thirty-three in the advanced stages of the disease. They were injected with the vaccine every two weeks for three months, and were carefully monitored for three years. In three of the patients in the advanced stages of cancer, the disease disappeared and in the others, it did not spread for five to twenty-four months. However, no great difference was seen in the patients in the early stages of the illness.
This new vaccine uses the patients’ own immune system. I
A. Right
B. Wrong
C. Not mentioned
[填空题]
A new study from the New Internet & American Life Project
has found that 73 percent of US teenagers aged between 12 and 17, use the
Internet. Most of these teens say being online has improved their relationship
with friends and helped them make new friends.
The top five
online activities for teens are: e-mail, surfing for fun, visiting entertainment
sites, using instant messaging (IM) and researching hobbies.
About 13 million teens, or 74 percent of all online teens, use instant
messaging. Only 44 percent of online adults use IM. Nineteen percent of teen IM
users say IM is now the main way they communicate with their friends. Fifty-five
percent of parents with online teens say learning how to use the Internet is
essential for their children’s future success, while a further 40 percent say it
is important. Just over 60 percent of parents say they have rules about Internet
use, and the same proportion check to see what sites their childre
[填空题]
A new study from the New Internet & American Life Project has found that 73 percent of US teenagers aged between 12 and 17, use the Internet. Most of these teens say being online has improved their relationship with friends and helped them make new friends.
The top five online activities for teens are: e-mail, surfing for fun, visiting entertainment sites, using instant messaging (IM) and researching hobbies.
About 13 million teens, or 74 percent of all online teens, use instant messaging. Only 44 percent of online adults use IM. Nineteen percent of teen IM users say IM is now the main way they communicate with their friends. Fifty-five percent of parents with online teens say learning how to use the Internet is essential for their children’s future success, while a further 40 percent say it is important. Just over 60 percent of parents say they have rules about Internet use, and the same proportion check to see what sites their children visit. Forty-fiv
