单项选择题

A．They have difficulty identifying these cells.
B．They aren’’t sure how these cells work.
C．They’’ve learned how to reproduce these cells.
D．They’’ve found similar cells in other species.
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单项选择题
A．Graduate school application procedures.B．Funding for university education.C．Winning the confidence of voters.D．Preparing for an important test.
A．Graduate school application procedures.
B．Funding for university education.
C．Winning the confidence of voters.
D．Preparing for an important test.
单项选择题
A．All men are created equal.B．The wounded and dying should be treated for free.C．A wounded soldier should surrender before he receives any medical treatment.D．A suffering person is entitled to help regardless of race, religion or political beliefs.
A．All men are created equal.
B．The wounded and dying should be treated for free.
C．A wounded soldier should surrender before he receives any medical treatment.
D．A suffering person is entitled to help regardless of race, religion or political beliefs.
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