问题
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7,5,3,10,1,(),()A.15,-4 B.20,-2 C.15,-1
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2,1,6/7,4/5,10/13,()A.4/3 B.3/4 C.7/15 D. 7/16
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7,5,3,10,1,(),()。 A.15,-4B.20,-2C.15,-1D.20,0
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2,1,6/7,4/5,10/13,()。A.4/3 B.3/4 C.7/15 D.7/1
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7,5,3,10,1,(),()A.15,-4 B.20,-2 C.15,-1 D.20,0
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7,5,3,10,1,(),()。A.15,-4B.20,-2C.15,-lD.20,0