下列哪个组织被完全切断后可致肛门失禁( )
A．肛提肌B．联合纵肌C．肛门内括约肌D．肛管直肠环E．肛门外括约肌皮下部
参考答案：D
–Would you like to go to Mike’s birthday party with us?
–I will go to his party if I .
A．will invite
B．is invited
C．is inviting
D．am invited
下列关于骨传导的叙述，正确的是
A．是指经过听骨链的传导途径B．敏感性与气传导基本相同C．在正常声波传导中作用很小D．耳蜗病变时通常不受损
