【单选题】He was __________ much surprised at the news that the amateur athlete beat the professional one who ranked top ten. [ ]
【简答题】图示电路中, 与 的导数表达式分别为 ( ) 和 ( ) ;相量表达式分别为 ( ) , ( ) 。
【单选题】The bad news upset me very much.
【单选题】. Good news! We didn’t spend ______ we had expected.