[填空题]UN is trying to work out ways to prevent HIV/ AIDS transmission from mother to child.

[填空题]UN is trying to work out ways to prevent HIV/ AIDS transmission from mother to child.

[填空题]USAID is trying to work out ways to prevent HIV/ AIDS transmission from mother to child.

[单项选择]

I’ve never been able to work her out. The underlined part means （）

A. to work together with her
B. to understand her
C. to ask her out
D. to persuade her

[简答题]
AIDS has now surpassed the Black Death on its course to become the worst pandemic in human history. At the end of 2004, 20 million people had been killed by it, and twice that number is currently infected with HIV. Barring a medical breakthrough, it could claim the lives of some 60 million people by 2015. AIDS exerts a terrible toll on societies, crippling their economies, decimating their labor forces and orphaning their children.
Nine out of 10 people living with HIV are in the developing world; 60 to 70% of those are in Sub-Saharan Africa. But the disease is spreading in every region, with fierce epidemics threatening to tear through countries such as India, China, Russia and the islands of the Caribbean. The statistics are sobering — in some Southern African towns 44% of pregnant women are HIV positive, in Botswana 37% of people carry the virus.
Immune assassin
The human immunodeficie

[单项选择]
AIDS has now surpassed the Black Death on its course to become the worst pandemic in human history. At the end of 2004, 20 million people had been killed by it, and twice that number is currently infected with HIV. Barring a medical breakthrough, it could claim the lives of some 60 million people by 2015. AIDS exerts a terrible toll on societies, crippling their economies, decimating their labor forces and orphaning their children.
Nine out of 10 people living with HIV are in the developing world; 60 to 70% of those are in Sub-Saharan Africa. But the disease is spreading in every region, with fierce epidemics threatening to tear through countries such as India, China, Russia and the islands of the Caribbean. The statistics are sobering — in some Southern African towns 44% of pregnant women are HIV positive, in Botswana 37% of people carry the virus.
Immune assassin
The human immunodeficiency viru
A. People killed by it are the same in number with the people being infected with HIV.
B. It poses serious problems to human beings’ development both in medical and in social sense.
C. Most of the people killed by it are from the developing world.
D. 44% of women are HIV positive in some Southern African towns.

[填空题]

When was HIV/AIDS first recognized

[单项选择]HIV引起AIDS的感染类型属于
A. 急性感染
B. 慢发病毒感染
C. 隐性感染
D. 慢性感染
E. 显性感染

[单项选择]从HIV感染到发展为典型AIDS分为
A. 急性感染期、无症状感染期、艾滋病相关综合征、艾滋病(艾滋病完全型)
B. 隐形感染期、无症状感染期、艾滋病相关综合征、艾滋病(艾滋病完全型)
C. 急性感染期、隐形感染期、艾滋病相关综合征、艾滋病(艾滋病完全型)
D. 隐形感染期、急性感染期、艾滋病相关综合征、艾滋病(艾滋病完全型)
E. 急性感染期、艾滋病相关综合征、无症状感染期、艾滋病(艾滋病完全型)

[单项选择]In no circumstances can more work be got out of a machine than ______.
A. be put into it
B. is put into it
C. to put into it
D. that is to be put into it

[单项选择]It would have taken hours to work the sum out, so he（）his pocket calculator.
A. turned out
B. turned to
C. turned up
D. turned off