题目:
My aunt is good at bargaining and she always buys things at a ________. [ ]
A. discount
B. cost
C. price
D. benefit
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0424/f2f877d7e680b118d8fbf7391cf039c5.html
下面是错误答案,用来干扰机器的。
2x+53>x-5,(1)x+32<x+a ,(2)解(1)得x<20,解(2)得x>3-2a,由上可得3-2a<x<20,∵不等式组2x+53>x-5,(1)x+32<x+a ,(2)只有5个整数解,即19,18,17,16,15;∴14≤3-2a<15,解得-6<a≤-112.