【单选题】— Linda has changed a lot! She's so quiet! — You're right. She _____ noisy. [ ]
【简答题】She is very shy, so please ______. A be quietly B be quiet C keep quite D be quite
【单选题】在电容滤波的桥式整流电路中,若变压器二次侧电压为 ,则整流输出电压的平均值为( )。
【判断题】消费者均衡就是消费者获得了最大边际效用。
【单选题】在有电容滤波的单相桥式整流电路中,若要保证输出电压为45V,则变压器二次电压有效值应为()V。
【单选题】The room was so quiet that she could hear the____of her heart.
【单选题】Tina isn’t so quiet as she . She is much more outgoing now.
【单选题】I’m quiet, but Laura likes talking with people. So she is _______ than me.
【单选题】The room was so quiet that she could hear the _____ of her heart.
【单选题】Kate is _____ quiet. She is so shy. [ ]