【单选题】如果锯齿波扫描电压周期是被测信号周期的 4倍,则荧光屏上会出现( )个完整波形。
【单选题】This ____ girl is Mary’s cousin, who is very lovely.
【简答题】Besides ______, she is kind and considerate. a. pretty and clever b. being pretty and clever c. her pretty and clever d. she is pretty and clever
【单选题】定义锚记主要用到 标签中的( ) 属性。
【简答题】the synomym of attractiv is ______
【单选题】This _____girl is Linda’s cousin.