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【单选题】
正弦电源是100rad/s,220V,两线圈串联,一个线圈电阻是100欧姆电感是3H,另一个线圈电阻是100欧姆电感是10H,互感M是5H。若想让总电压总电流同相位,应该串联电容值为A.
11.1uF
B.
33.3uF
C.
66.6uF
D.
99.9uF
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反馈参考答案：
举一反三
【单选题】EFI系统的电动汽油泵的控制形式,不可能的是:( )。
A.
点火开关控制
B.
发动机ECU控制
C.
油泵开关(空气流量计内)控制
D.
发动机ECU与油泵开关共同控制
【单选题】At what age was Toni Morrison when she wrote her first novel, The Bluest Eye? ( )
A.
20
B.
39
C.
45
D.
31
【单选题】Which of the following is NOT true about Phyllis in the early 1770s?
A.
She wrote her first poem when in her teens.
B.
She married in 1771.
C.
She became a teacher.
D.
She was able to get her poems published.
【单选题】This is . She wrote her name on the first page.
A.
a Sherry's book
B.
a book of Sherry
C.
a book of Sherry's
D.
Sherry's a book
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