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【单选题】
地下室的外墙如果用钢筋混凝土或素混凝土，其最小厚度应该不小于()。A.
200mm
B.
300mm
C.
400mm
D.
500mm
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反馈参考答案：
举一反三
【单选题】关于杂合子与纯合子的正确叙述是（）
A.
两纯合子杂交后代都是纯合子
B.
两杂合子杂交后代都是杂合子
C.
纯合子自交的后代都是纯合子
D.
杂合子自交的后代都是杂合子
【单选题】The US Food and Drug Administration regulates only bottled water sold across state lines, but that produced and sold in the same state_______________regulation.
A.
be addicted to
B.
is exempt from
C.
approve of
【单选题】Wealth may tempt weak-willed persons to be __________ to harmful habits, such as drug-taking and gambling, and result in their own destruction.
A.
addicted
B.
indulged
C.
immersed
D.
devoted
【单选题】关于纯合子和杂合子的叙述中,正确的是( )
A.
杂合子双亲至少一方是杂合子
B.
杂合子的后代一定都是纯合子
C.
纯合子测交后代都是纯合子
D.
杂合子自交后代都是杂合子
【简答题】阅读理解。 People can be addicted to(沉溺于) different things - e.g. alcohol, drug, certain foods, or even television. People who have such an addiction are compulsive(强迫的): they have a very powerful psycholo...
【单选题】下列关于纯合和杂合子的叙述正确的一项是()
A.
纯合子的自交后代都是纯合子
B.
杂合子的自交后代都是杂合子
C.
纯合子中不含隐性遗传因子
D.
杂合子的双亲至少有一个是杂合子
【简答题】阅读理解。 People can be addicted to different things- e. g. alcohol, drug, certain foods,or even television. People who have such an addiction are compulsive: they have a very powerful psychological need ...
【简答题】(a) People may commit crimes because they are addicted to drugs. (b) Drug ________ may be a cause of crime.
【单选题】下列关于纯合子与杂合子的叙述,正确的是
A.
纯合子自交,后代不发生性状分离
B.
杂合子杂交,后代不发生性状分离
C.
纯合子自交,后代发生性状分离
D.
杂合子自交,后代不发生性状分离
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