If you want to become master of a language you have to study it in ________ (deep) for years.
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Last week the plane crashed in the desert and the scientists are now ____________ (investigate) to find out the cause of the crash.
广播电视新闻节目越来越要求权威性、信息量和可看性的高度统一。
A. 对
B. 错
全世界通行的新闻直播标识是在屏幕右上角出现“ ”的字样。
讲解技能是教师主要用语言的方式,向学生传授知识和方法,启发思维,表达思想感情的一类教学行为。( )
A. 对
B. 错