400-600-1123
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答案：
E
Note:x
>Marker:y
10>=5x+3y
那么：4x+4y<=10么
（1）x<1 根据题干 ，x<1 得出y<5/3 此时：4x+4y是大于10的 不成立 不充分
（2）11x<=10 x<=10/11 根据题干得出：y<=20/11
此时：4x+4y>10的 不成立
联立（1）（2）取x<10/11 y<5/3
此时：4x+4y不小于10 不成立
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