在2011年春晚中，西单女孩演唱了《想家》，旭日阳刚演唱了《春天里》。草根演员首次在春晚舞台拥有了独立节目，彰显了开门办春晚的新思路。走向大众的春晚焕发了新的活力。可见（   ）         
①创新是文化富有生机与活力的基础
②文化创新离不开对传统文化的继承
③先进的文化应贴近人民群众的实际需求
④离开了社会实践，文化创新就会成了无源之水、无本之木

短文改错。

例： Jim get up at seven in the morning.         gets

    I live in the country and my father was ____ a farmer. He is now forty—five year ____ old. Because of years of hard work, he looks old ____ than his age.When I was young, he use ____  to tell me the importance of study. Father knows little about English and other subject____ . But he usually gives me some good advices ____ on how To learn my lessons good____. He is not only kind to me But also very strict with me. With the____  help, I've made great progress. I'll never forgot ____ what he taught me. I think my father is a ____ best father in the world.

“它繁荣的奴隶制经济、典型的民主政治和辉煌的文化艺术，一直为后世所赞叹。”引文赞叹的是（    ）

下列物质中，只含有离子键，不含有共价键的是（   ）

如右图所示，用一个带负电的物体a去接触不带电的验电器的金属球b时，金属球b也带上负电，则（  　）