2009年12月1日,欧盟宪法正式生效。 从此以后,世界上将有一个可以代表整个欧盟说话的人。下列对欧洲联盟的叙述,错误的是( )
A:有利于世界多极化的发展
B:提高了欧洲国家的国际地位
C:有利于协调欧盟国家之间的关系
D:增强了与美国争夺世界霸权的力量
阅读短文,判断正误。
I have a happy family. There are five people in my family. My grandpa and my grandma are very old, they like watching TV very much. My father is a doctor, and my mother is a nurse. They work hard. I'm a student in Grade Three. I love my family.
三种血管的血流的方向是:____→____→____.