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【单选题】
在上题中,该线性网络的开路电压为 6V ,短路电流为 2A ,当外接电阻为( )时,可获得最大功率。A.
1Ω
B.
2Ω
C.
3Ω
D.
4 Ω
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举一反三
【单选题】Why did the author go to the mall? The author went to the mall to buy __________.
A.
a new dress
B.
a pair of new trousers
C.
a pair of new shoes
D.
a new T-shirt
【简答题】旅行社有组织生产职能、 、分配职能、 、信息职能。
【单选题】Why did the author mention comments by the volunteer drivers in Paragraph 6-8?
A.
To prove that men in the 17-25 age bracket were the most erous and accident-prone group.
B.
To support the claim that music with a strong beat leads to aggressive driving.
C.
To indicate the pace of the driving is governed by the pace and beat of the music.
D.
To give an example that soothing music makes drivers relaxed and sleepy.
【单选题】Why did the author begin to doubt himself after the first year of his writing career?
A.
He wasn't able to produce a single book.
B.
He hadn' t seen a change for the better.
C.
He wasn' t able to have a rest for a whole year.
D.
He found his dream would never come true.
【简答题】旋转增料的要点是什么?
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