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【单选题】
如图所示,开关S闭合前电路已处于稳态,则闭合开关S的瞬间,初始值 和 分别为()A.
0,1.5A
B.
1.5A,1.5A
C.
3A,1.5A
D.
3A,3A
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举一反三
【单选题】Why did the author offer the AIDS course?
A.
He wanted to teach people about a cure for AIDS.
B.
People need to be taught how to avoid those with AIDS.
C.
He wanted to teach the students that AIDS resulted from moral failure.
D.
People take improper attitudes towards AIDS and those with or at high risk of AIDS,
【简答题】
【单选题】What can be inferred from the passage about AIDS vaccine?
A.
In the near future AIDS vaccines will be found.
B.
The time is ripe for experts to find AIDS vaccines.
C.
AIDS vaccines are difficult, if not impossible, to find.
D.
AIDS vaccines failures were due to the trials on animals.
【单选题】Most people in the USA believe that______.
A.
AIDS is no longer an epidemic
B.
AIDS is killing more people than before
C.
there is still no cure for AIDS
D.
advances have been made in treating AIDS
【简答题】A． has spread all over the world. B． has killed numerous people. C． cannot be conquered. D． is serious in middle-aged people.
【单选题】The third reason for AIDS education is _____________.
A.
to reduce the fear of HIV and AIDS
B.
to bring down the death rate of AIDS
C.
to prevent the spread of HIV
D.
to protect HIV-positive people or AIDS patients
【简答题】A．To investigate the causes of . B．To raise money for patients. C．To rally support for victims' in Africa. D．To draw attention to the spread of in Asia.
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