题目内容
Baker had never thought of becoming a writer until he was in the eleventh grade. ( )
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Teachers found it painful to read students’ long and lifeless essays.
Before Mr. Fleagle became the English teacher for Baker’s class, the English course had been interesting. ( )
In Baker’s opinion, Mr. Fleagle was really a formal, rigid and out-of-date teacher only because of Fleagle’s manner of speaking.
多级单调谐放大器的增益比单级单调谐放大器的增益______
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