A:how they were excited
B:how excited they were
C:how excited were they
D:they were excited
①发展中国特色社会主义文化要坚持为人民服务的方针
②文化创新的源泉是社会实践
③文艺工作者是文化创造的主体
④文化创造必须树立文化自觉和文化自信
如图,在半径为2cm的⊙O中有长为23cm的弦AB,则弦AB所对的圆心角的度数为( )
如图,某同学把一块三角形的玻璃打破成了三块,现在他要到玻璃店去配一块完全一样形状的玻璃,那么最省事的办法是带去( )