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【判断题】
DNA分子中含有大量的稀有碱基A.
正确
B.
错误
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举一反三
【单选题】What can be inferred about formal schooling in colonial North America?
A.
It was generally required by law.
B.
It was considered relatively unimportant.
C.
It was improperly administered.
D.
It was highly disciplined.
【单选题】Although he was generally considered an extremely ______individual, his testimony at the trial revealed that he had been very ______.
A.
intrepid...valiant
B.
guileless...hypocritical
C.
abstemious...temperate
D.
meek...timorous
E.
ingenuous...obtuse
【简答题】通过以下哪种功能可以查找一本整刊?A. 4
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