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【单选题】
关于DNA变性的叙述正确的是A.
磷酸二酯键断裂
B.
A260降低
C.
DNA变性后溶液黏度升高
D.
变性是可逆的
E.
热变性是缓慢发生的
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【简答题】D It seems that great artists and scientists often suffer from mental problems. Both Einstein and Dickens had mental illness. Now scientists have started to look at whether mental illness and genius a...
【简答题】Gaia hypothesis
【多选题】What is the relationship between Uranus and Gaia?
A.
brother and sister
B.
father and daughter
C.
son and mother
D.
husband and wife
【单选题】According to the creation myth, Gaia produced _____.
A.
Kronos
B.
Uranus
C.
Zeus
D.
--
【单选题】Which statement about Newton and Einstein is NOT true?
A.
They both committed to the study of space and time and put forward their own theories.
B.
Einstein's theory of relativity preceded the theories about the black holes.
C.
Newton believed that the laws of motion are different for objects on Earth and in space.
D.
Einstein's theory of relativity proved that some of the Newton's beliefs were wrong.
【简答题】Gaia假说
【简答题】Gaia假说
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