题目内容
（请给出正确答案）
Scientists and environmentalists think that global warming can be ______.
A．continued
B．improved
C．controlled
D．reduced
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A.Whats happening at the time.
B.Earlier life experiences.
C.Working environment,
D.Serf-control ability.
A．A person needs to go back home frequently.
B．A person needs adjustment in a new environment.
C．A person needs to experience some frustration.
D．A person needs to depend on others.
Scientists believe that uranium was absorbed by the Earth when it was formed.
A．Y
B．N
C．NG
Scientists believe that ___________________ (用脑越多，思维就越活跃).
According to the scientists it is the emission of CO(2 by human beings that causes the increases of CO2 levels.
A．Y
B．N
C．NG
Some scientists set up domes in the Polar Regions.
A．Y
B．N
C．NG
A．It makes things difficult for scientists seeking research funds．
B．People would not believe scientists even when they tell the truth．
C．It may dampen the enthusiasm of scientists for independent research．
D．Scientists themselves may doubt the value of their research findings．
Scientists will have to ______ (提出增加世界粮食供应的新方法).
