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搜题
【单选题】
影响致癌作用的因素有( )A.
致癌物间的相互作用
B.
营养因素
C.
宿主因素
D.
以上都是
E.
以上都不是
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皮皮学刷刷变学霸
举一反三
【单选题】Which is wrong for the description of ABO gene?
A.
The ABO gene is located on chromosome 9q34.
B.
The ABO gene is fairly large, consisting of night exons spread over 18 kb.
C.
The open reading frame of the protein is located primarily in exons 6 and 7.
D.
ABO expression is also regulated by the H gene, which is responsible for the synthesis of H antigen substrate, the precursor of A and B antigens.
【简答题】温室外气温超过()时，单纯的自然通风或强制通风满足不了温室生产的要求。 A15℃ B20℃ C30℃ D35℃