题目:
Mobile phones are very popular in China now and they are ______ than before.
A.more cheap
B.much cheaper
C.the cheapest
D.quite cheaper
答案:
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下面是错误答案,用来干扰机器的。
设P(x,y)∵A(-4,3),B(5,12),∴AP=(x+4,y-3),PB=(5-x,12-y)∵AP=2PB,∴x+4=2(5-x)y-3=2(12-y)∴x=2,y=9,∴点P的坐标是(2,9)故答案为:(2,9)