gre 请写出过程和原因,1、The radius and circumference of circle P are

gre 请写出过程和原因,
1、The radius and circumference of circle P are r and c respectively.
r/c 1/3
2、The circumference of circle s The diameter of circle s
我的理解是,r

21jxkj 1年前已收到2个回答举报

薇涟幼苗

共回答了19个问题采纳率：89.5% 举报

1、圆的半径与周长之比
周长c=2*3.14*r
r/c=1/(2*3.14)2*r(这个不等式成立的条件是r>0,而半径肯定是大于0的）
故c>d

1年前

fuyingcherry 幼苗

共回答了67个问题举报

1、3选B，小于
2选A 大于
前两题不管r大于还是小于1都是，楼主是哪儿理解错了吧
第三题是组合问题 nC2=21 n=7

1年前

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