随着植被的恢复进程，群落的阳性种类逐渐减少，中生性种类逐渐增加。
The number of the heliophytes in the communities decreased gradually, while mesophytes increased with the process of vegetation restoration.
方法：采用分层整群抽样方法，对武汉市某中学212名初一、二学生进行自编的初中生性知识性态度问卷调查。
Methods:A stratified cluster sample of 212 junior middle school students was investigated with a self-made questionnaire.
方法：采用分层整群抽样方法，对武汉市某中学212名初一、二学生进行自编的初中生性知识性态度问卷调查。
Methods:A stratified cluster sample of 212 junior middle school students was investigated with a self-made questionnaire.
应用推荐