2016????????????????

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???2016???????????????????????(?)???????

2015-2016???????????????????????

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A? B? C? D?

8?????{an}??a1=1?a7=?23????{}??n??????n=( A?14 B?15 C?16 D?18

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7????ABC??AB=

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2015-2016??????????????????????????????

?????????12??????5???60?.

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??????2015???????????


?2016????????????????????????
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