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【单选题】
Which is not housekeeping gene?A.
tRNA gene
B.
rRNA gene
C.
mitochondria gene
D.
hemoglobin gene
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【单选题】An important point the author made in this passage is ______.
A.
living together before marriage is significant every couple should try it
B.
living together before marriage is a choice that should be respected
C.
living together is the best way to bridge the gaps between a couple
D.
living together is a symbol of the modem form. of civilization
【单选题】An important point the author made in this passage is ______.
A.
living together before marriage is significant every couple should try
B.
living together before marriage is a choice that should be respected
C.
living together is the best way to bridge the gaps between a couple
D.
living together is a symbol of the modern form. of civilization
【简答题】根据给出的图片回答下列问题: 井格式基础是(); 箱型基础是(); 桩基础是(); 条形基础是()。
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