题目内容

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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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 Fleagle was really a formal, rigid and out-of-date teacher only because of Fleagle’s manner of speaking.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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多级单调谐放大器的通频带比单级单调谐放大器的通频带______

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