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【单选题】
设F（x）是f（x）的一个原函数，则∫e-xf（e-x）dx等于下列哪一个函数？（）A.
F（e-x）+c
B.
-F（e-x）+c
C.
F（ex）+c
D.
-F（ex）+c
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举一反三
【单选题】People favor the independence of school for the reason that
A.
people believe that it will ensure the existence of freedom.
B.
people believe that it will deprive the school of the financial aid.
C.
local government can rid itself from the financial burden.
D.
state government is not willing to exert its effort on it.
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【单选题】Petitions have been taken to be one of the ways for the British people to express their ideas.
A.
Right
B.
Wrong
C.
Not mentioned
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