400-600-1123
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答案：
E
GL\P\R三人打
包装书的箱子，问R/P的值
1.L装了总数的30%。
2.R比P多装了10箱。
1.因为不知道R和P分别的值，所以没办法求得R/P;不充分
2.R=P+10,因为不知道P，所以也不能求得R/P，不充分。
二者联立，因为不知道总数，所以仍然无法求得R\P 
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