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【单选题】
通常把位地基上、埋置深度小于( )m的一般基础(柱基或墙基)称为天然地基上的浅基础。A.
4;
B.
5;
C.
6;
D.
8。
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【简答题】图所示的电路中,VD 1 、VD 2 为硅管,V CC =+5V,R 1 =1kΩ,试求: (1)若U A =U B =3 V,F点的输出电位是多少?二极管工作于什么状态? (2)A、B两点的输人波形如图(b)所示,求输出波形。 (a) (b)
【简答题】利用节点电位法,可以计算图2所示电路中1Ω电阻上的电流I。若选择b点为参考点,则b点的电位为( )V;现对未知节点c和a列节点电位方程: 1. 求方程左边的参数为:节点c的自电导为( )西门子,节点c和节点a的互电导为( )西门子,节点a的自电导为( )西门子。 2. 求方程右边的参数为:流过节点c的电流源的代数和为( )A,流过节点a的电流源的代数和为( )A。 3. 解方程可得节点...
【简答题】People who have finished education often admire students for their carefree life. But they don't know how difficult it is to _____ a student. He can never finish his homework. Furthermore, he has to _...
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【简答题】Just Introduce Yourself It’s so easy to walk into your first job and feel like a stranger in a strange hand. But you don’t have to stay that way, and you shouldn’t. You have to remind yourself to kick...
【单选题】Which of the following is true of distance education?
A.
The majority of the students fail to pass its examinations.
B.
Personal tutors are assigned to students to offer regular help.
C.
Teachers and students communicate through correspondence.
D.
The courses are set up to suit the pace of each individual student.
【简答题】Beyond Baby Mozart, Students Who Rock Music education hasn’t changed much since the 1970s. Students are still taught to read notation(乐谱) so they can recite compositions that they would never listen t...
【简答题】利用节点电位法,可以计算图2所示电路中1Ω电阻上的电流I。若选择C点为参考点,则C点的电位为( )V;现对未知节点A和B列节点电位方程: 1. 求方程左边的参数为:节点A的自电导为( )西门子,节点A和节点B的互电导为( )西门子,节点B的自电导为( )西门子。 2. 求方程右边的参数为:流过节点A的电流源的代数和为( )A,流过节点B的电流源的代数和为( )A。 3. 解方程可得节点...
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