挑战习题
1/5单选题
难度:

1.下列做法属于在传播途径中控制噪声的是
A 汽车进入市区后禁止鸣喇叭
B 图书馆里不能大声喧哗
C 飞机旁的工作人员带上耳罩
D 高速公路两侧安装透明板墙
提示1:
5LqG6Kej5o6n5Yi25Zmq6Z+z55qE5LiJ56eN5pa55byP
正确答案:RA==
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