在MSR路由器上使用ping命令时，可以用（）参数来设定所发送的ICMP报文长度。
A.–n
B.–c
C.–b
D.-s
参考答案：D
Not only______ interested in football but _____ beginning to show an interest in it. [ ]
A. the teacher himself is; all his students are
B. the teacher himself is; are all his students
C. is the teacher himself; are all his students
D. is the teacher himself; all his students are
宁夏的冬天，人在户外说话时呼出“白汽”，“白汽”形成的原因是（ ）
A．汽化
B．液化
C．升华
D．凝华
