对于机场飞机噪声应以( )作为噪声源评价量。

A．倍频带声压级

B．声功率级

C．等效连续A声级

D．计权等效连续感觉噪声级

A．Students are encouraged to read more books.

B．Reforms should be taken especially at the high school level.

C．It is necessary to improve the education level.

D．American adults should learn from the Asian adults.