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【多选题】
Which of the following sentences are more concise?A.
At the time of registration, students are required to make payment of their library fees.
B.
At registration students must pay their library fees.
C.
The land settlement was an example where my client, Mr. Smith, did not receive fair treatment.
D.
The land settlement was unfair to my client, Mr. Smith.
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【简答题】丛菊两开他日泪。（《秋兴八首》（其一））“开”是什么意思？
【单选题】用2.5kV兆欧表测量半绝缘电压互感器的绝缘电阻时，要求其绝缘电阻值不小于（）
A.
1MΩ/kV；
B.
10MΩ/kV；
C.
100MΩ/kV；
D.
500MΩ/kV。