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Diagram 3 shows animals classified into two groups, X and Y.
图3显示动物被归类成两组,X和Y。
Diagram 3/ 图3
Which of the following have been correctly classified into group X and group Y?
下列哪项被归类组是正确的?
Chapter 单元:
Standard 5,五年级:Survival of Species 物种的生存
Note 备注:
X = Animals reproduce by giving birth。X是胎生动物
Y = Animals reproduce by laying egg。Y是卵生动物