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【简答题】
交流电路的电抗数值方程为; 当角频率ω1=5Hz ,测得电抗x1 为0.8Ω ; 当角频率ω2=2Hz ,测得电抗X2 为0.2Ω; 当角频率ω3=1Hz ,测得电抗X3 为-0.3Ω 。 试用最乘法求电感L 、电容C 的值。
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【简答题】决定颜色明亮程度的是颜色的那个属性 .
【简答题】CHECK约束被称为______约束,UNIQQUE约束被称为_______约束。
【单选题】It was ________ that I couldn’t finish it by myself. A. so difficult a work B. such a difficult work C. so difficult work D. such difficult work
A.
so difficult a work
B.
such a difficult work
C.
so difficult work
D.
such difficult work
【单选题】Of the two physics problems, Martha just finished ______ one. A. the most difficult B. the least difficult C. the less difficult
A.
the most difficult
B.
the least difficult
C.
the less difficult
【单选题】Do you think maths is _____ than English? [ ]
A.
difficult
B.
as difficult
C.
more difficult
D.
most difficult
【简答题】UNIQUE约束被称为 约束。
【单选题】______, it was completed on time.
A.
Difficult as the task was
B.
Difficult as was the task
C.
As the task was difficult
D.
As was the task difficult
【简答题】CHECK 约束被称为 约束,UNIQUE约束被称为 约束。
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