利用环境因素来促进疾病康复的方法称为（）
A.运动康复
B.自疗康复
C.怡情康复
D.自然康复
E.治疗康复
参考答案：D
Studies show the MP3 people have made much use of _____ music may be causing hearing
loss in many people. [ ]
A. enjoy
B. to enjoy
C. enjoying
D. enjoyed
相对于概率抽样，非概率抽样的优点有（）
A.快速简便
B.不需要抽样框
C.严格按随机原则抽取样本
D.能够保证样本对总体的代表性
E.费用相对较低
