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请教高人freetalk

what's  the difference between mammals and animals ?
这个freetalk 这么写啊，哪位高人帮帮忙。[tt7] [tt37] [tt37].

What’s the difference between mammals and fish?
There are a few differences between mammals and fish. Firstly, the important traits of mammals are that they don’t lay eggs. Most mammals give birth to their babies. Secondly, mammals are warm-blooded. Thirdly, mammals have fur and hair. In my opinion, these are main differences between mammals and fish..

估计孩子考到这个题目，十有八九要考砸了.

这个题目蛮怪的，mammal属于animal，
Mammals give birth to their babies and feed them with milk.
Animal is a big family including fish, reptile, insect, mammal, bird and so on.
正在上班，水平有限，先写两句。回家问问小子，这种话题是他最擅长的。.

回复 4#九八虎的妈 的帖子

谢谢九八虎妈。我就是不知道动物和哺乳类动物之间的区别。.

回复 2#九八虎的妈 的帖子

再加一个，the number of mammals are much less than that of animals.

这个算不算…….