If the speakers in an installation are out of phase， this means that（）A、the subwoofer is at the wrong angle.B、the front and rear speakers are reversed.C、the polarity of the speakers are reversed.D、the angle of the speakers are incorrect.
If the speakers in an installation are out of phase， this means that（）
- A、the subwoofer is at the wrong angle.
- B、the front and rear speakers are reversed.
- C、the polarity of the speakers are reversed.
- D、the angle of the speakers are incorrect.
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Strategies are the invaluable ways and means of helping speakers to overcome communication breakdowns, to deal with trouble spots, and to enhance fluency.() 此题为判断题(对，错)。
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单选题If the speakers in an installation are out of phase， this means that（）Athe subwoofer is at the wrong angle.Bthe front and rear speakers are reversed.Cthe polarity of the speakers are reversed.Dthe angle of the speakers are incorrect.
单选题Effective speakers adjust their voices（）the larger audience and work（）avoiding distracting physical mannerism and verbal habits.Aat； toBin； atCto； atDto； for
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