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平均功率又称有功功率

A. 对
B. 错

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在电感电路里，电流滞后电压90°

A. 对
B. 错

The 1950s and 60s saw a surge in political and civil rights debates in America, with the ___________ taking center stage.

A. government
B. college campus
C. White House

Specialistsseevariousreasonsfortherecentsurge____ inflation.

In summer,touristsflock ____ themuseumsandartgalleries.