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【单选题】
人类社会迄今为止共产生了( )种性质的法律。
A.
1种
B.
2种
C.
3种
D.
4种
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A.
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B.
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C.
chicken farmers order certain strains of chicken for economic reasons.
D.
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A.
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D.
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B.
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相关题目：
【单选题】The technology of freezing stem cells from different strains of chicken can do all the following EXCEPT that ______
A.
farmers can order certain strains of chicken only.
B.
Origen can supply all the strains of chicken the market might need
C.
chicken farmers order certain strains of chicken for economic reasons.
D.
chicken farmers can be supplied with whatever strain they need
查看完整题目与答案
【简答题】Gene technology to benefit people Among all the fast growing science and technology, the research of human genes, or biological engineering as people call it, is drawing more and more attention now. S...
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查看完整题目与答案
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D.
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