题目: 比的前项乘2,后项除以2,比的值就缩小4倍.______. 答案: 因为a:b=ab,所以(a×2):(b÷2),=2a:12b,=4ab,则:4ab÷ab=4(倍);所以比的前项乘2,后项除以2,比的值就扩大4倍;故答案为:错误.
题型:选择题 单项选择。______ go to the park every Sunday. [ ]A. Tom and you B. Tom and I C. I and you D. Tom, I and you 查看答案