已知<img src='https://img2.soutiyun.com/ask/2020-02-09/950139600063173.png' />(Fe³⁺/Fe²⁺)=+0.77V，今测得E(Fe³⁺/Fe²⁺)=+0.73V，这说明( )

已知下列反应的平衡常数：<img src='https://img2.soutiyun.com/ask/2019-12-18/945528385312623.png' />则同温下反<img src='https://img2.soutiyun.com/ask/2019-12-18/945528393394473.png' />的平衡常数为( )。

已知香农公式<img src='https://img2.soutiyun.com/latex/latex.action' />，不能得出的结论是______。

已知某个电路元件上的电压和电流为<img src="https://img2.soutiyun.com/ask/2020-07-07/96296750308178.png"/><img src="https://img2.soutiyun.com/ask/2020-07-07/962967514498434.png"/>求电压与电流的相位差。

已知两个线性变换<img src='https://img2.soutiyun.com/ask/2020-07-24/964447450539867.png' />，求从<img src='https://img2.soutiyun.com/ask/2020-07-24/964447482729708.png' />到<img src='https://img2.soutiyun.com/ask/2020-07-24/964447490132131.png' />的线性变换。

已知A<img src='https://img2.soutiyun.com/ask/2019-12-05/944436769682424.png' />B且A∈B，下列结论正确的是( )．

已知f(0)=0，若<img src='https://img2.soutiyun.com/latex/latex.action' />，则f&39;(0)=( )．

已知函数<img src='https://img2.soutiyun.com/latex/latex.action' />则下列结论中( )正确．

已知事件A、B满足<img src='https://img2.soutiyun.com/ask/2019-12-25/946136490188197.png' />，则P(A-B)=( )．

已知P(A)=P(B)=<img src='https://img2.soutiyun.com/latex/latex.action' />，则下列结论肯定正确的是( )

已知z=lnu，<img src='https://img2.soutiyun.com/latex/latex.action' />，则<img src='https://img2.soutiyun.com/latex/latex.action' />( )

已知乙醇的标准沸点是78℃,<img src='https://img2.soutiyun.com/ask/2020-09-20/969471531436313.png' />计算10.0kPa时乙醇的沸点.

已知i为虚单位<img src='https://img2.soutiyun.com/shangxueba/ask/18162001-18165000/18164859/2015122210164736518.jpg' />，则z的实部为（）。

题图所示电路中，已知总电流I=2A，则支路电流I1是()<img src='https://img2.soutiyun.com//1/2021-05-26/990874677721769.png' />

已知微分方程<img src='https://img2.soutiyun.com/shangxueba/ask/17664001-17667000/17666030/2015102914210098816.jpg' />的一个特解为<img src='https://img2.soutiyun.com/shangxueba/ask/17664001-17667000/17666030/2015102914210098816.jpg' />，则此微分方程的通解是（）．

已知C=0.1uF,设计电路，使<img src='https://img2.soutiyun.com/ask/2020-07-08/963072655894631.png' />

已知一立体的轴测图,按箭头所指的方向的视图是()。<img src='https://img2.soutiyun.com/shangxueba/ask/2021-11/16/1370/20211116151240722.png' />

已知<img src='https://img2.soutiyun.com/shangxueba/ask/51249001-51252000/51250992/974464162712768.png' />求(A·)^-1

采用加入HBr溶液的方法，将AgCl沉淀转化为AgBr，试求Br^-的浓度必须保持大于Cl^-的浓度的多少倍？已知AgCl的，已知AgCl的<img src='https://img2.soutiyun.com/ask/2020-11-12/974058800830502.png' />，AgCl的<img src='https://img2.soutiyun.com/ask/2020-11-12/974058821037658.png' />。

已知｜a｜=2，｜b｜=<img src='https://img2.soutiyun.com/shangxueba/ask/17682001-17685000/17682935/2015102711295155630.jpg' />，且a？b=3，则｜a×b｜等于（）

已知f（x）的原函数为<img src='https://img2.soutiyun.com/shangxueba/ask/18741001-18744000/18743910/2016071616173232033.jpg' />＝（）<img src='https://img2.soutiyun.com/shangxueba/ask/18741001-18744000/18743910/2016071616172745358.jpg' />

已知三阶矩阵A的逆矩阵<img src='https://img2.soutiyun.com/ask/2020-12-02/975754124741759.jpg' />，求矩阵A。

已知齐次线性方程<img src='https://img2.soutiyun.com/shangxueba/ask/19020001-19023000/19020937/2015110116061593238.png' />有非零解，则常数λ可取为（）

（2013）已知矩阵<img src='https://img2.soutiyun.com/shangxueba/ask/19026001-19029000/19027677/2015110316053773060.png' />相似，则λ等于：（）

已知图示结构EI=常数，A、B两点的相对水平线位移为：（）<img src='https://img2.soutiyun.com/shangxueba/ask/17727001-17730000/17728519/2015102815263390018.jpg' />

已知材料屈服极限=300MPa,结构截面形状如图所示，则极限弯矩Mu=()。<img src='https://img2.soutiyun.com/1/2021-04-07/986665904085718.jpg' />