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【单选题】
设1将已知元件的R、C、L等的参数值代入数量关系2将s域中每个元件看成电阻建立数量关系3画出s域等效电路4求出Y(s)的逆变换即得响应y(t)5根据数量关系求出响应的拉氏变换Y(s) ,则s域电路分析法的步骤是A.
①②③④⑤
B.
③②⑤④①
C.
④⑤①②③
D.
③②①⑤④
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【简答题】七选五: The "Chong Yang Festival" is celebrated on the ninth day of the ninth lunar month , which is also known as the Double Ninth Festival . 1 . Climbing Mountains People like to climb mountains o...
【简答题】《诗经》本只称《诗》后又以“______”为代称，是中国最早的诗歌总集。
【单选题】Which of the following has "celebrate" with the same meaning as that in "celebrates and highlights the intelligence and wit of the rat"
A.
It's Dad's birthday and we're going out for a meal to celebrate.
B.
How do you usually celebrate New Year?
C.
The bravery of warriors was celebrated in song.
D.
The team is celebrating their third successive win.
【单选题】盐析法沉淀蛋白质的原理是
A.
调节蛋白质溶液的等电点
B.
与蛋白质结合产生不溶性的蛋白盐
C.
降低蛋白质溶液的介电常数
D.
中和蛋白质表面电荷，破坏水化膜
E.
以上都是
【简答题】《诗经》本只称《诗》后又以“______”为代称，是中国最早的诗歌总集。收录了从周初到春秋时期的诗歌305篇，分为“风”“雅”“颂”三大类，开创我国文学_________传统。
【单选题】盐析法沉淀蛋白质的原理是
A.
中和蛋白质所带电荷，破坏蛋白质分子表面的水化膜
B.
与蛋白质结合成不溶性蛋白盐
C.
降低蛋白质溶液的介电常数
D.
改变蛋白质溶液的等电点
【单选题】In " The Celebrated Jumping Frog of Calaveras County", what is the appropriate meaning of "celebrated"?
A.
showing that a day or an event is important by doing sth special on it
B.
performing a religious ceremony
C.
praising sb/sth
D.
famous for having good qualities
【简答题】《诗经》本只称《诗》,后又以《 》为代称,是中国最早的诗歌总集。收录了从周初到春秋时期的诗歌305篇,分为“风”“雅”“颂”三大类,开创了我国文学的 传统。
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