电器设备着火应用（）灭火。
A.水
B.干粉灭火器
C.氧气呼吸器
参考答案：B
机体血虚最多涉及的脏腑是（）
A.脾、肾
B.肺、脾
C.心、肾
D.心、肝
E.心、脾
___( )___ is the sending and receiving of the message by computer. It is a fast, low-cost way of communicating worldwide.
A．LAN
B．Post office
C．E-Mail
D．Interface
