题目内容

对于乙类功率放大器,其工作导通角小于900。

A. 对
B. 错

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对于乙类功率放大器,输入信号越小,失真越大。

A. 对
B. 错

Sandra usually wears ______ sunglasses.

A. big blue
B. blue big
C. blue nice

Have you seen my _____ sweatshirt?

A. yellow old
B. old yellow
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A. wooden big red
B. red big wooden
C. big red wooden