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【判断题】
群体遗传学研究的重要内容是用实验方法获得种群不同世代的基因频率和基因型频率,从而计算种群的演化速率,并分析种群演化可能受到的各种力量。这种说法对吗?A.
正确
B.
错误
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举一反三
【单选题】To get an education, _______.
A.
working hard is very importan
B.
working hard is needed
C.
one must work hard
D.
it is needed to work hard
【单选题】To get an education, ___________.
A.
one must work hard
B.
working hard is necessary
C.
there is need to work hard
D.
hard work is needed
【简答题】机床夹具的作用?
【单选题】To get an education ,_________.
A.
one must work hard
B.
working hard is needed
C.
what you need is to work hard
D.
what one needs is to work hard
【单选题】To get an education, _______.
A.
working hard is very important
B.
working hard is needed
C.
it is needed to work hard
D.
one must work hard
【简答题】简述机床夹具的作用
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