公共安全沟通管理
参考答案：
所谓沟通，是人与人之间的思想和信息的交换，是将信息由一个人传达给另一个人，逐渐广泛传播的过程。
下图所示的实验操作，正确的是
The house was very quiet, ______ as it was on the side of a mountain.
A．isolated B．isolating C．being isolated D．having been isolated
