1999年，世界上一种全新的货币欧元诞生。其票面由窗户、大门和桥梁三个基本建筑构成，分别代表欧盟之间的开放、合作与沟通精神。下列关于欧盟的说法不正确的是（    ）

如图，抛物线与x轴交于A（x₁，0）、B（x₂，0）两点，且x₁＜x₂，与y轴交于点C（0，﹣4），其中x₁，x₂是方程x²﹣4x﹣12=0的两个根．

改革开放三十年来，我国的社会主义现代化建设取得了举世瞩目的伟大成就，经济、社会快速发展，国家日益繁荣昌盛，真正跨入了民族振兴的时代。从中我们可以悟出（  ）

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中单词的正确形式填空
    Do you know how to be a top student? Top students are decided by a new way now. New rules for middle school students ____ (come) out in March. The best students should not only have good grades. You'll be a top student ____  you follow the new rules.____  (one), you need to be honest. You should never copy others’ homework. Second, good students love animals and care____ other people. They try to do something to protect animals, too. Are you one of them? Third, you should learn that teamwork____  important. So be friendly to the people you are with and it can make your team stronger.

如图，在△ABC中，∠ACB=90°，∠A=30°，CD⊥AB，AB=8，则BC=____，∠BCD=____，BD=____．