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【简答题】
已知△ABC的三个顶点坐标分别是A（4，1），B（3，4），C（-1，2），BD是∠ABC的平分线，求点D的坐标及BD的长．
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举一反三
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【单选题】在对待中国传统道德的问题上,只承认其一般性、普遍性而否定其个别性和特殊性,把传统的东西与现代的事物完全等同的观点,属于 ( )
A.
．拿来主义
B.
．复古论
C.
历史虚无主义
D.
．全盘西化论
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【单选题】Some teenagers think that being famous will ______ them rich and happy. [ ]
A.
help
B.
let
C.
make
D.
become
【单选题】三相异步电动机转子电阻增大时,电动机的
A.
A临界转差率减小、最大转矩增大
B.
B临界转差率增大，最大转矩不变
C.
C临界转差率增大，最大转矩减小
D.
D临界转差率减小，最大转矩减小
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