以地球组成结构为主题写一篇英语作文120字~160字

Question

如题所述

Answer 1

The internal can be roughly divided into three of the material and different came, the outer layer is called the earth's crust, the central part called nucleus, the middle layer to curtain call. if the internal structure of the earth to make a figure of speech, it is like an egg, the core is equivalent to the egg yolk protein, curtains, is equivalent to the earth's crust is equivalent to egg