单项选择题

Which of the following statements is supported by the passage

A．Crows have relatively long lives.
B．Crows have keen vision.
C．Crows are usually solitary.
D．Crows are very intelligent.
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单项选择题
According to the first paragraph, what evidence is there that crows have interested people for a long time
A．The large number of stories about crows.
B．The frequency with which crows are sighted.
C．The amount of research that has been conducted on crows.
D．The ease with which crows are identified.
单项选择题
In the last paragraph community based forms of treatment is used ______.
A．in contrast to treatment in specialized institutions
B．to show how efficient it is for mental illness and other diseases
C．to show how futile specialized treatment can be
D．as a synonym to treatment in specialized institutions
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