单项选择题

A．more efficient as
B．so efficient than
C．so efficient as
D．as efficient as
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单项选择题
A．longB．extensiveC．exquisiteD．extreme
A．long
B．extensive
C．exquisite
D．extreme
单项选择题
A．survivesB．remainsC．lastsD．continues
A．survives
B．remains
C．lasts
D．continues
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