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radium 选择性必修1000 全国卷频次：0 /ˈreɪdiəm/ n. 镭 无高考真题原句提选He was one of 80 middle school students from China attending a month-long “Youth Summit”.他是来自中国的80名中学生之一，参加一个为期一个月的"青年峰会"。One day Merlin received an invitation to attend a fancy dress ball.有一天，梅林收到了参加一个奇装异服舞会的邀请。 |