A Bluetooth device can be either a master or a slave and any of the devices within a (1) can be the master. There is only one master and there can be up to (2) 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 (3) 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 (4) mode before it can become active. Within a network, all (5) communications are prohibited.

1（）

A．Wireless LAN

B．Wireless MAN

C．Cellular radio network

D．Piconet

高渗性缺水，其体液变化之最终表现是（）。

A.细胞外液缺水

B.细胞内液缺水

C.细胞内液缺水超过细胞外液缺水

D.细胞内外液等量缺水

E.细胞外液缺水超过细胞内液缺水