题目内容
The developing nations want rich countries to help shoulder the cost of ________ forests.
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In the study, researchers succeeded in determining how coffee ________ different areas of the brain in 15 volunteers.
They are trying to ________ the risk as much as they can by making a more thorough investigation of the market.
The cycles of the sun and moon are simple, but ____ forces which have shaped human lives since the beginning.
An effort was launched recently to create the first computer ________ of the entire human brain.
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