机组粗氩II出口氩中含氮量超过()将连锁关V705V708 ["3ppm","4ppm","5ppm","2ppm"]
机组膨胀机密封气压力大于()允许启油泵 ["A.0.03Mpa","B.0.2Mpa","C.0.3Mpa","D.0.4Mpa"]
空气中氩的体积含量为() ["0.932%","0.1%","0.03%","0.057%"]
《雨打芭蕉》是一首由()三重奏的民间乐曲。
《拉网小调》是()民歌,《桔梗谣》是()民歌,《梭罗河》是()民歌,《小杜鹃》是()民歌,《伏尔加船夫曲》是()民歌,《红河谷》是()民歌,《桑塔•露琪亚》是()民歌,《克里门泰因》是()民歌。
郑律成,朝鲜人,作曲家,主要代表作有歌曲()、歌剧()等。