对于PN结,设P区电位为Up、N区点位为Un,说法正确的是()。[br][/br](单选题) A: Up>Un B: Up C: Up≥Un D: Up≤Un
对于PN结,设P区电位为Up、N区点位为Un,说法正确的是()。[br][/br](单选题) A: Up>Un B: Up C: Up≥Un D: Up≤Un
In his speech, he _____________ that the UN should set up an emergency center for the environment.
In his speech, he _____________ that the UN should set up an emergency center for the environment.
The infectious disease can _____________ the country in a short time. A: un up against B: sweep through C: work on D: shake up
The infectious disease can _____________ the country in a short time. A: un up against B: sweep through C: work on D: shake up
中国大学MOOC: 集成运放工作在_____时，当uN<uP时（其中uN为反相输入端信号，uP为同相输入端信号），输出电压uo为_____。( )
中国大学MOOC: 集成运放工作在_____时，当uN<uP时（其中uN为反相输入端信号，uP为同相输入端信号），输出电压uo为_____。( )
2、单位设置的快捷键为： ？ A: U B: UN C: UP D: UN＋空格
2、单位设置的快捷键为： ？ A: U B: UN C: UP D: UN＋空格
When the WWII was over, Britain was active in setting up the United Nations and became one of the ______ permanent members of UN ______
When the WWII was over, Britain was active in setting up the United Nations and became one of the ______ permanent members of UN ______
集成运放工作在_____时，当uN<uP时（其中uN为反相输入端信号，uP为同相输入端信号），输出电压uo为_____。( ) A: 非线性，+UOH B: 线性，-UOL C: 非线性，-UOL D: 线性，+UOH
集成运放工作在_____时，当uN<uP时（其中uN为反相输入端信号，uP为同相输入端信号），输出电压uo为_____。( ) A: 非线性，+UOH B: 线性，-UOL C: 非线性，-UOL D: 线性，+UOH
对理想运放“虚短”、“虚断”的正确描述是（ ）。（注：下标P、N代表同相输入端和反相输入端） A: uP=uN=0；iP=iN=0 B: uP=uN；iP=iN=0 C: uPuN；iP=iN D: uPuN；iPiN
对理想运放“虚短”、“虚断”的正确描述是（ ）。（注：下标P、N代表同相输入端和反相输入端） A: uP=uN=0；iP=iN=0 B: uP=uN；iP=iN=0 C: uPuN；iP=iN D: uPuN；iPiN
In his speech he ( ) that the UN should set up an emergency centre for the environment. A: justified B: approved C: proposed D: thrive
In his speech he ( ) that the UN should set up an emergency centre for the environment. A: justified B: approved C: proposed D: thrive
对于PN结,设P区电位为Up、N区点位为UN,说法正确的是： ( )。
对于PN结,设P区电位为Up、N区点位为UN,说法正确的是： ( )。