【单选题】( ) is killed by Romeo. A. B. C. D. Lawrence 答案:C
【单选题】改变555定时电路的电压控制端CO的电压值,可改变()。
【多选题】Romeo killed ____ and bid farewell to .
【判断题】Romeo killed Tybalt, Juliet's cousin, to revenge for his friend Mercutio.
【单选题】Romeo killed and bid farewell to .
【简答题】化简 = _________ .(其中a≥0)