国家开展下图中所示的活动，有利于（ ）①帮助未成年人远离网络，避免诱惑②实施对未成年人的司法保护③营造健康向上的文化和社会环境④规范市场秩序，保护公民的知识产权
Einstein’s Theory of Relativity is so________ that most of us can not understand it.
Art is influenced by _____ customs and faith of ____ people
--- John failed his final exam. -- I’m not surprised at the news at all. _______, he is never seen busy with his lessons.
Great changes ______ in my hometown in the last ten years.
---I think Helen is at home. ---No, shebe at home, for she phoned me from the airport just five minutes ago.
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