下列有关晶体的叙述中，不正确的是（   ）

如图为某地地质构造简图，读图完成下题．

一个正方形和两个等边三角形的位置如6所示，若∠3 = 50°，则∠1+∠2 =（   ）

阅读理解
    Most of the people in China can have four seasons. However, people in South China have three seasons --- spring, summer and fall. They don't have winters. In north China, people have a cold, dry and windy winter. But people in Kunming only have one season --- spring. It's warm and rainy all the year. You can see green trees and beautiful flowers there. So “ Spring City ”is another name for Kunming.

When you can't hear clearly. What should you say? __________