【单选题】Self-test I . Language in Use Choose the appropriate word or expression to fill in each blank. She has the ability to __________ with young minds.
【单选题】I . Language in Use Choose the appropriate word or expression to fill in each blank. 1. We should _________ oil and gas by full use of other energy sources.
【简答题】In this section, there is a passage with 10 blanks. You are required to select one word for each blank from a list of choices given in the word bank following the passage. Read the passage through car...
【判断题】集成运算放大器,当工作在线性区时,有两个特点:同相输入端电位等于反相输入端电位(称为虚短);同相输入端电流等于反相输入端电流且等于零(称为虚断)。
【判断题】当理想运算放大器工作在线性区时,同相输入端与反相输入端的电位近似相等,如同将两端短接一样,称为虚地。
【判断题】运算放大器两输入端电位相等,当反相输入端通过一个电阻接地时,信号从同相输入端输入,同相输入端的电位也一定为零。