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第1题

催化剂可以增大化学反应速率，主要是因为反应的（）。
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第2题

During the AmericaCivil War, what were the elevesoutherslave states called
·The Confederate States of America
·The
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第3题

Which of the following institutions is part of the Judicial Branch of the federal government
·The House of Representa
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第4题

What is the oldest university ithe United States
·Columbia University
·Stanford University
·BrowUniversity
·
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