活性宫内节育器指是______IUD和______IUD，与惰性IUD比较，它的优点是______。
参考答案：带铜；带孕酮；失败率低
In my opinion, all Mr. Li ______ good to his students in his class at present. He is very strict with them in
their studies.[ ]
A. does does does
B. does do did
C. does does do
D. did do does
痿病的病因病机为（）
A.风寒外袭，痹阻经络
B.肺热津伤，津液不布
C.湿热浸淫，气血不运
D.脾胃受损，精血不足
E.肝肾亏损，髓枯筋痿
