[填空题]In the past eight years USAID has experimented a lot and improved various methods to slow the spread of epidemic.

[填空题]In the past eight years USAID has experimented with and improved various methods to slow the spread of HIV/AIDS.

[填空题]In the past eight years USAID has experimented a lot and improved various methods to slow the spread of epidemic.

[单项选择]

In the past 200 years, Australia has lost 19 species (种类) of animals and 76 species of plants.
The Australian National Parks and Wildlife Service estimates that between 100 and 250 million species of animals and plants have lived on Earth since life began about 3.5 million years ago. Today, there are between 5 and 10 million species, of which up to 1 million or more species could be extinct (灭绝) by the year 2010.
Today the council of state and federal ministers responsible for nature conservation (保护) has produced a list of currently endangered vertebrate fauna (脊椎动物). Three species of whale, various birds, a number of frogs, snakes and fish are also on the list.
But there is some cause for optimism (乐观). Several species previously believed extinct have reappeared in recent years.
This could mean that other "extinct" species may yet surface--even the Tasmanian tiger, which some authorities believe still exists in the remote regions of Tas
A. life history on Earth
B. animals and plants in the world
C. disappearances of animals and plants in Australia
D. discoveries of new animals and plants in Australia

[单项选择]

During the past years, intelligent technology has evolved (116) three generations. The first was characterized by tools such as prolog and OPS. prolog is a simple backward-chaining environment, and OPS is a simple forward-chaining environment. This led to the second generation of knowledge-engineering environments. Its goal was to model, prototype and construct (117) systems.
All three generations were oriented toward generic (118) and represented generalized implementation environments for the construction of expert systems. knowledge bases and AI applications.Some of the solution-oriented products are also seamlessly integrated with generic knowledge-engineering environments, permitting end users to add (119) rules and objects, as well as predefined knowledge-based logic to address problems in manufacturing simulation.Marketplace orientation is rapidly (120) toward solution-oriented intelligent product environments. the fourth generat
A. custom
B. knowledge
C. through
D. problemsolving

[填空题]In the past thirty years Iran has been doing secretly the nuclear enrichment work, which is a direct challenge to the United States, Europe and the rest of the world.

[简答题]It is of little consequence what your past has been. What matters to you and for you is right now. It is not your concern what others may be saying or doing. When you are taking care of yourself, you have very little time to pay attention to others. People can love you or hate you, ignore you or dote on your every word. No matter what anyone else may think or do or say, it has very little impact on who you really are. It is only in your mind that you build or destroy the esteem for your "self". Selfesteem begins and ends with you. When you have it, you have it and no one can take it away from you.