手术时切断后会造成肛门失禁的组织是:()
A.外括约肌皮下部
B.外括约肌浅部
C.外括约肌深部
D.内括约肌
E.肛管直肠环
参考答案:E
3.07与3.070的大小______,3.07的计数单位是______,3.O70的计数单位是______.
______ animals died because of the bad weather. [ ]
A. Thousand of
B. Thousands of
C. Two thousands