单项选择题

A．They both attract scientists’’ attention
B．They can both be quite challenging
C．They are both thought-provoking.
D．They may both lead to surprising findings.
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单项选择题
It is the opinion of the author that the academy, compared with the public high school, was________.
A．obviously academically better
B．more discriminatory in student selection
C．coeducational
D．not generally considered as a public institution
单项选择题
A．It is more exciting than space travel.B．It is much cheaper than space travel.C．It is much safer than space travel.D．It is less time-consuming than space travel.
A．It is more exciting than space travel.
B．It is much cheaper than space travel.
C．It is much safer than space travel.
D．It is less time-consuming than space travel.
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