[求助]gwd18-15

poorleafs

If R = P/Q, is R ≤ P ?

(1) P > 50

(2) 0 < Q ≤ 20

答案Ｅ，我選Ｃ

recently

P = RQ

(1)P = 100, R = 500, Q = 2/1 --> P<R

P = 100, R = 20, Q = 5 --> P>R

(2) Same as (1)

meimei5656

条件1没的说，不充分，

条件2，要区分Q是否大于1，所以也是不充分的。

poorleafs

many  thanks !!!