动物胚胎发育中的真体腔的主要形成方式有哪些？
题型：问答题 简答题
问题：
动物胚胎发育中的真体腔的主要形成方式有哪些？
题型：问答题 简答题
Look and judge. 看图，判断正(T)误(F)。
1.
This country is Canada. The capital city of Canada is Canberra. They speak English. ( )
2.
This country is the U. K. The capital city of the U. K. is London. ( )
3.
This is Tian'anmen Square. It is in Beijing. ( )
4.
This is south. South points down. ( )
5.
In this country, there are beautiful beaches. The capital city is Ottawa. ( )