题目内容

___ are the factors that have contributted to the development of the US economy.

A. the vast space and resources of the land
B. the ideals of freedom and ecnomic prosperity
C. English as its natioanl language
D. hard work by the people

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Hamilton believed that the US should pursue economic growth through ___

A. shipping
B. manufacturing
C. banking
D. slavery

The American South is a center of traditional crops such as ___.

A. tobacco
B. corn
C. cotton
D. wheat

In the US, ____ tend to specialize the high-tech and computer industries.

A. Northeast
B. Midwest
C. Northwest
D. Southeast

对于麦克斯韦速率分布中最概然速率的正确理解,应是:

A. 最概然速率为分子速率分布中大部分气体分子具有的速率
B. 最概然速率为分子速率分布中速率的最大值
C. 最概然速率为分子速率分布函数的极大值
D. 最概然速率附近单位速率区间内的分子数最多