填空题

Two of the most vital functions performed in any economy are

【参考答案】

saving and investment
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单项选择题
A．Because she is lonely.B．Because she loves to protect a pet.C．Because she thinks dogs are good companions.D．Because she just lost one dog.
A．Because she is lonely.
B．Because she loves to protect a pet.
C．Because she thinks dogs are good companions.
D．Because she just lost one dog.
问答题
In short, a leader of the new school contends, the scientific revolution, as we call it, was largely the improvement and invention and use of a series of instruments that expanded the reach of science in innumerable direction.
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