腓总神经损伤可致哪块肌肉瘫痪（）
A.趾长屈肌
B.腓肠肌
C.腓骨长肌
D.胫后肌
E.股四头肌
参考答案：C
He spoke so _____ that nobody could understand him. [ ]
A. slowly
B. clearly
C. quickly
D. loudly
划分VLAN的常用方法有（）、按MAC地址和按第三层协议划分三种。
A.按IP地址
B.按交换端口
C.按帧
D.按信元交换
