将探测器接收的信息转换为数字信号的是()
A.信号放大器
B.探测器
C.A/D转换器
D.信号比较器
E.后组探测器
参考答案:C
___ with people in the countryside, people in cities can have better education and enjoy various
kinds of entertainments.[ ]
A. Comparing
B. Being compared
C. Having compared
D. Compared
什么叫房地产物业管理服务?物业管理服务是怎样产生的?有什么意义?