【单选题】在黄酮化合物的醇溶液中,加人二氯氧锆甲醇液呈鲜黄色,再加人枸橼酸甲醇液,黄色不褪 表示该化合物具有
【单选题】__________ she couldn't understand was__________ fewer and fewer students showed interest in her lessons.
【单选题】在黄酮化合物的醇溶液中,加入二氯氧锆甲醇液呈鲜黄色,再加人枸櫞酸甲醇液,黄色不褪表示该化合物具有
【单选题】The book's written by my brother. Don't you find it () .
【单选题】I don't think there is _______ in today's newspaper. [ ]
【单选题】—Let's play volleyball! —I don't like to play volleyball, that sounds ______. [ ]