以软骨变性破坏为主要病理改变的风湿病是
A．类风湿关节炎
B．强直性脊柱炎
C．风湿热关节受累
D．骨关节炎
E．痛风性关节炎
参考答案：D
The two girls are so alike that strangers find_______difficult to tell one from the other. [ ]
A. it
B. them
C. her
D. that
下肢止血带应扎于大腿（）交界处。
A.中下1/3
B.中上1/3
C.大腿根部
D.股动脉
