阅读这篇英语短文,回答一个问题
But the Earth is not straight!It has an angle of 23°.(哎,回归线不是23.）This means that only part of the Earth gets a lot of heat from the sun.This is the part nearest to the sun.
Complete the information:
23°：_____
我写的是tropic.可是文中没出现.应该怎么写呢?
=..=