关于成人妇女子宫的叙述,下列哪项正确()
A.子宫上部较子宫下部稍窄
B.重约100g
C.长度7~8cm
D.宫体:宫颈=1:2
E.子宫腔容积约10ml
参考答案:C
How long ______ teaching? Forty years.
A.he will have been
B.will have he been
C.will have been he
D.will he have been
以下网络攻击中,哪种不属于主动攻击_______。
A.重放攻击
B.拒绝服务攻击
C.通信量分析攻击
D.假冒攻击