题目内容

2. Teachers found it painful to read students’ long and lifeless essays.

A. 对
B. 错

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3. Before Mr. Fleagle became the English teacher for Baker’s class, the English course had been interesting.

A. 对
B. 错

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4. In Baker’s opinion, Mr. Fleagle was really a formal, rigid and out-of-date teacher only because of Fleagle’s manner of speaking.

A. 对
B. 错

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电压调整和频率调整的区别

A. 稳态条件下交流系统的频率具有同一性，而系统中各节点电压不同;
B. 保证频率质量的首要每件是有充足的有功各用，保证电压质量的首要条件是有充足的无功备用;
C. 有功电源单一，无功电源多种多样;
D. 无功电源不消耗一决拖嚣;有功电谏则需要消耗一次能
E. 调频手段单一，集中进行; 调压手段多种多样，分散进行，

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电网中无功损耗的主要在

A. 发电机
B. 变压器
C. 线路
D. 负荷

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2. Teachers found it painful to read students’ long and lifeless essays.

A. 对 B. 错

3. Before Mr. Fleagle became the English teacher for Baker’s class, the English course had been interesting.

4. In Baker’s opinion, Mr. Fleagle was really a formal, rigid and out-of-date teacher only because of Fleagle’s manner of speaking.

电压调整和频率调整的区别

电网中无功损耗的主要在

A. 对
B. 错