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【简答题】
ABO血型系统将人类的血型分成___、___、___、___四种血型;Rh血型系统将人类的血型分成___和___两种血型。
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反馈参考答案：
举一反三
【简答题】As a freshman in university, you must be a very lucky one. Your families, your teachers, and I are doing everything we can to make sure you have the education you need. I would like to invite you to t...
【单选题】We invite families_ with young Children first.
A.
board
B.
has board
C.
to board
D.
boarding
【单选题】We invite families ____ with young children first.
A.
board
B.
has board
C.
to board
D.
boarding
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