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【单选题】Every year television stations receive hundreds of complaints about the loudness of advertisements. However, federal rules forbid the practice of making ads louder than the programming. In addition, t...
A.
TV stations always operate at the highest sound levels
B.
their sound levels are kept around peak levels
C.
their sound levels are kept in the middle frequency ranges
D.
unlike regular programs their intensity of sound varies over a wide range
【单选题】肺部叩击排痰的部位正确的是（）
A.
背部从第十肋问隙、胸部从第十肋间隙向上叩击到肩部
B.
背部从第十肋间隙、胸部从第六肋间隙向上叩击到肩部
C.
背部从第六肋间隙、胸部从第十肋问隙向上叩击到肩部
D.
背部从第六肋间隙、胸部从第六肋问隙向上即击到肩部
E.
背部从第八肋间隙、胸部从第八肋间隙向上叩击到肩都