【多选题】关于茶树鲜叶和茶叶中的芳香类物质,下列说法正确的是( )。
E.
茶叶中含有棕榈酸、高级萜烯类,这些物质本身无香气,但有很强的吸附性,能吸收香气和异味
【单选题】This digital radio looks fashionable, ______ it often fails to work
【简答题】This digital radio looks stylish, _____ it often fails to work.
【单选题】The BBC has just successfully demostrated a new digital radio _______ system.
【判断题】标准差的大小可以用来说明均数代表性的好坏
【单选题】8051 定时 / 计数器的 ( ) 具有重装载初值的功能
【单选题】The old radar-and-radio system is becoming______, as new digital technology provides airline pilots with satellite signals to aid in navigation.