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【单选题】
问:S有几个共同祖先?S的近交系数是多少?A.
2，1/8
B.
4，1/8
C.
2，1/4
D.
4，1/4
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反馈参考答案：
举一反三
【简答题】简述什么是电子商务(E-Commerce)
【简答题】Many people run after goals that they hope will make them happy，but happiness is not always the final result.So how does one decide which goals will end in personal happiness and which will not？How do...
【单选题】Since many young people have become rich on .com, I wonder what ________ is like to run a successful on-line business.
A.
that
B.
this
C.
it
D.
one
【单选题】Mary felt very _______ because it was her birthday yesterday. [ ]
A.
happy
B.
happily
C.
sorry
D.
unhappy
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