运输机巷、采区进回风巷的最低和最高容许风速分别为()。
A、0.25m/s6m/s
B、0.15m/s6m/s
C、0.25m/s4m/s
D、0.15m/s4m/s
参考答案:A
Children who are not active or__________diet is high in fat will gain weight quickly.
A.what
B.whose
C.which
D.that
ARP协议的作用是(),ARP报文封装在()中传送。
ARP报文封装在()中传送
A.以太帧
B.IP数据报
C.UDP报文
D.TCP报文