中国人民志愿军入朝作战的原因是什么？

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中国人民志愿军入朝作战的原因是什么？

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美军一直打到中国边境鸭绿江边；美军飞机轰炸扫射中国东北边境城市；美国第七舰队入侵中国台湾海峡；美国的侵略活动严重威胁中国的安全。

MOVIE GUIDE THURSDAY
Rush Hour 15:00 23:00		My Life as Mcdull 9:00 13:00
①Action Movie Do you like Jackie Chan? Rush Hour is another movie of his. It’s so exciting. Come and have fun!		②Cartoon Mcdull is a little pig. He’s kind of silly but he’s very cute. Do you want to enjoy happiness with him? Be sure to watch it!
Mr. Bean 11:00 19:00		Harry Potter Ⅲ 17:00 21:00
③Comedy Rowan is a great actor. His movie Mr. Bean is coming. It’s very funny. Don’t miss it!		④Science Fiction Harry Potter has been in the wizardry school (魔法学校) for three years. He begins a new life. How is everything going?