单项选择题

A．Because it serves only a few specialties.
B．Because it’s too crowded.
C．Because it’s too costly.
D．Because the service is too slow.
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单项选择题
A．It had its limitations.B．Its results were regarded as final.C．It was supported by the government.D．It was not sound theoretically.
A．It had its limitations.
B．Its results were regarded as final.
C．It was supported by the government.
D．It was not sound theoretically.
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