题目内容
Scientific findings come about as a result of painstaking efforts and long periods of______.
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When goods are in supply, the exchange process does not require significant promotion and facilitation.
Textiles made of cotton or flax will_____ a little bit after being washed.
Spain's prime minister ordered Spanish troops _ out of Iraq as soon as possible.
Mobility requires the development of vastly more sense and internal communication than are found in plants or fungi.
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