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【单选题】

四色猜想最先提出的是（）

A.
阿佩尔
B.
摩尔根
C.
古德里
D.
哈密顿
题目标签：猜想四色猜想
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【单选题】How much sleep does a person need (31) the physiological bases of the need for sleep remain conjectural (猜想), rendering conclusive answers to this question impossible, much evidence has been gathered...
A.
unless
B.
however
C.
although
D.
even if
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【简答题】设0＜θ＜ ，已知 ， ,猜想 ＝________．
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【简答题】由1+3=22，1+3+5=32，1+3+5+7=42，猜想1+3+5+7+…+（2n+1）=______．
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【单选题】How much sleep does a person need?【B1】the physiological bases of the need for sleep remain conjectural(猜想), rendering conclusive answers to this question impossible, much evidence has been gathered on...
A.
As
B.
Despite
C.
While
D.
Whether
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【单选题】How much sleep does a person need (31) the physiological bases of the need for sleep remain conjectural (猜想), rendering conclusive answers to this question impossible, much evidence has been gathered...
A.
extend
B.
range
C.
alter
D.
rise
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【单选题】当1，2，3，4，5，6时，比较和的大小并猜想（）
A.
时，
B.
时，
C.
时，
D.
时，
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【判断题】孪生素数猜想已经被证明出来了。()
A.
正确
B.
错误
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【单选题】How much sleep does a person need (31) the physiological bases of the need for sleep remain conjectural (猜想), rendering conclusive answers to this question impossible, much evidence has been gathere...
A.
brief
B.
precise
C.
correct
D.
concise
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【单选题】已 知 且 ,计算 ,猜想 等于( )
A.
B.
C.
D.
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【简答题】观察下列等式： ， ， ，…… （1）猜想并写出第 n个等式； （2）证明你写出的等式的正确性．
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