单项选择题

When did Apple released the first Macintosh

A．In 1981.
B．In 1982.
C．In 1984.
D．In 1994.
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单项选择题
It can be inferred that the author regards a program of controlled fluoridation of public water supplies as ______.
A．an unnecessary government program that wastes economic resources
B．a potentially valuable strategy of preventive medicine
C．a government policy that has relatively little effect on the health of a population
D．an important element of curative medicine
单项选择题
According to the passage, Wineland was characterized by which of the following geographical features
A．Woods only.
B．Hills only.
C．Woods and hills only.
D．Flat rocks and hills only.
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