据悉，如果“嫦娥二号”卫星工作顺利，我国将可获取7米分辨率的图像，这将是世界上分辨率最高的月球图像。

用3轨CCD立体相机获得该图像的技术属于

A．GPS技术       B．GIS技术       C．RS技术     D．3S技术

A Bluetooth device can be either a master or a slave and any of the devices within a ___30___can be the master. There is only one master and there can be up to ___31___ active slave devices at a time within a single network. In addition, a device may be a standby slave or a parked slave. There can be up to ___32___.parked slaves. If there are already maximum number of active slaves, then a parked slave must wait until one of the active slaves switches to ___33___ mode before it can become active. Within a network, all ___34___ communications are prohibited.

34（）

A. master-to-master

B. Master-to-slave

C. slave-to-slave

D. Slave-to-master