问题
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:34,36,35,35,(),34,37,() A.36,33B.33,36C.37,34D.34,37
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1/3+ 1/15+ 1/35 +1/63 + 1/99+ 1/143+ 1/195+ 1/255的值是: A、6/17 B、6/19 C、8/17 D
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15,35,63,80,99,【】 A.120 B.132 C.143 D.225
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1/23/47/815/16()63/64 A.31/34B.33/34C.31/32D.23/32
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1/15,4/35,7/63,10/99,()。 A.14/121 B.17/133 C.13/143 D.17/152
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15, 35, 63, 80, 99, ()A.120 B.132 C.143 D.225