当 A 点位于饱和线右侧时,高频功率放大器处于 ( ) 工作状态,当 A 点位于饱和线左侧时处于 ( ) 工作状态。
A.
欠压,欠压
B.
欠压,过压
C.
过压,欠压
D.
过压,过压
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【单选题】听力原文:How much time will it take to finish the building? (A) The architect thinks about three more months. (B) The building is thirty stories high. (C) We'll be here about six o'clock. (26)
【单选题】听力原文:How much time will it take to finish the building? (A) The architect thinks about three more months. (B) The building is thirty stories high. (C) We'll be here about six o'clock. (27)