单项选择题

At first glance, a forest appears to be a haphazard collection of trees, shrubs, vines, and flowers.

A．random
B．total
C．graded
D．natural
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Modern nursing practices not only hasten the recovery of the sick but also promote better health through preventive medicine.
A．permit
B．determine
C．accelerate
D．accompany
单项选择题
Because of Delaware’s lenient laws regarding business incorporation, many companies have their headquarters in the state’s largest city, Wilmington.
A．production plants
B．home offices
C．sales representatives
D．chemical laboratories
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