2017年4月1日,中共中央、国务院印发通知,决定设立河北雄安新区。这对于集中疏解北京非首都功能,探索人口经济密集地区优化开发新模式,调整优化京津冀城市布局和空间结构,培育创新驱动发展新引擎+具有重大现实意义和深远历史意义。以上材料蕴含的哲学道理包括( )
①干事创业需要发挥主观能动性
②要树立创新意识勇于创新
③认识具有不确定性随机性
④实践要以正确认识为前提和基础
A:①②
B:①③
C:②④
D:③④
回答问题(简答)。
Lucy is my good friend. She is eleven years old. She is a student. She likes singing. She has a nail pet. Her name is Kitty. Look, Lucy's singing and the cat is dancing. Lucy wants to be a singer when she grows up.
Lucy's mother is a nurse. She works in a hospital. She likes shopping. She usually buys a lot of beautiful clothes at weekends.
①AD⊥BC;②CF⊥AE;
③∠1=∠2;④AB+BD=DE,
其中正确的结论有( )