IP地址的软件组态可选择BOOTP协议时，就必须获得硬件（）地址
A、令牌网
B、RS232
C、以太网
D、RS422
参考答案：C
We found several _______ of rice near the hole. The mice may have stored a lot of _______ in the hole.[ ]
A. grain; grain
B. grains; grains
C. grain; grains
D. grains; grain
关于喉上神经损伤说法正确的是（）
A.咯血
B.窒息
C.声音嘶哑
D.音调低沉
E.高热脉快
