我国工业企业噪音卫生标准规定新建企业的最高容许限值为()
A.85dB(A)
B.75dB(A)
C.65dB(A)
D.55dB(A)
E.50dB(A)
参考答案:A
在平面直角坐标系中,点P(1,3)在第( )象限.
A.一
B.二
C.三
D.四
That is Beckham. He was born _____1975. [ ]
A. at
B. on
C. in
D. to