【单选题】运算放大器电路如图所示,输入电压 u i = 2V ,则输出电压 u O 等于 ( ) 。
【单选题】同相比例运算放大器电路如图所示,输入u i 为有效电压为1V,R1和RF电阻分别为10KΩ和30KΩ,则输出的有效电压为( )V
【单选题】运算放大器应用电路如图所示,在运算放大器线性工作区,输出电压与输入电压之间的运算关系是( )。
【单选题】听力原文:W: I really like these gloves. They look good as a gift for my niece, but I'm afraid they will not fit. M: Don't worry. It says one size fits all. Q: What is this woman worried about? (17)
A.
Her niece will think these gloves are old-fashioned.
B.
Her niece might not like these gloves.
C.
These gloves might not be her niece's size.
D.
These gloves are the wrong colour.
【单选题】如图所示运算放大器电路 , 输入电压 u i =1V , 则输出电压 u O 等于 ( ) 。
【简答题】—I’m sorry I didn’t bring the book here. —Oh, ____. Bring it next time, OK? A.you’d better not B.I’m afraid not C.as you wish D.that’s all right
【单选题】—Could you finish the task in three days? — _____. I have something else to do these days. [ ]
【单选题】运算放大器应用电路如图所示,在运算放大器线性工作区,输出电压与输入电压之间的运算关系是()。