单纯扁平骨盆时，骨盆外测量小于正常值的径线是
A．髂棘间径
B．坐骨结节间径
C．髂嵴间径
D．骶耻外径
E．对角径
参考答案：D
Only __________ one loses freedom __________know its value．
A．when, he does
B．when, does he
C．what, he did
D．that, did he
下列哪个命令用来全局禁用当流量穿越防火墙时必须有相应的NAT转换规则存在的限制（）.
A.nat<interface>0
B.no nat-control
C.access-list
D.以上都不是
