依据国家环境噪声标准,对稳态、非稳态和间歇性噪声均以()为评价量。
A.A声级
B.A计权声功率级
C.等效连续A声级(LAeq)
D.倍频带声压级
参考答案:C
The Spring Festival is ___ us and we have a lot of things _____.
A.to; to buy
B.for; to be bought
C.nearby; bought
D.upon; to buy
简述法的规范作用的内容。