单项选择题

设函数f（x）在[a，b]上连续，在（a，b）可导，f'（x）>0，f（a），（b）

A.3
B.2
C.1
D.0

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Some experts,who regard language primarily as a code using symbols to represent sounds,（）reading as simply the decoding of symbols into the sounds they stand for.These authorities contend that meaning,being concerned with thinking.

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I like taking__________.Wherever I visit,I bring my camera with me.

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