妇产科手术损伤导致的最常见的尿瘘类型为
A.膀胱 * * 痿B.膀胱 * * * * 瘘C. * * * * 瘘D.膀胱宫颈 * * 瘘E.输尿管 * * 瘘
参考答案:E
对需要相反方向移动的两个牙或两组牙,以支抗力为移动牙齿的矫治力,这类支抗称为 ()
A.稳定支抗
B.加强支抗
C.差动力支抗
D.交互支抗
E.以上均不正确
The Declaration of Independence was drafted by a committee including ()as head.
A.George Washington
B.Thomas Jefferson
C.both A and B