环境噪声,是指在工业生产、建筑施工、交通运输和社会生活中所产生的( )的声音。
A.干扰周围工作环境
B.超过国家排放标准
C.超过地方排放标准
D.干扰周围生活环境
参考答案:D
Every necessary means____ to protect milu deer which____ very valuable to us. As a result,
the number of milu deer is increasing.
[ ]
A. are used; is
B. is being used; is
C. have been used; are
D. has been used; are
A320飞机当乘客少于多少人时,可以选择低流量()
A.75
B.95
C.115