1.If Jim and Bill have less than 15 dollars between them,and Bill has 4 dollars,which of the following could be the number of dollars that Jim has?A) 10 B) 11 C) 15increased by r times 是指 nx(r+1)呢 还是指 nxr呢1.A 2.E 4.D 5.C这几个也是
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