单项选择题

A．Gathering non-relevant materials.
B．Stealing another person’s ideas.
C．Sharing notes with someone else.
D．Handing in assignments late.
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单项选择题
A．He has never seen a fossil that old.B．It could be many millions of years old.C．It is probably a recent specimen.D．He will ask the lab how old it is.
A．He has never seen a fossil that old.
B．It could be many millions of years old.
C．It is probably a recent specimen.
D．He will ask the lab how old it is.
单项选择题
A．22℃.B．23℃.C．25℃.D．34℃.
A．22℃.
B．23℃.
C．25℃.
D．34℃.
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