下焦病证主要包括______和______的病变。
参考答案：足少阴肾经 足厥阴肝经
Once a reporter receives his assignment from the chief-editor, he has to ______ on his work and tries his best to work on it until the chief-editor ______ it. [ ]
A. fix his attention; approves
B. focus; proves of
C. concentrate; approves of
D. get down; approves
单张纸平版印刷机主要组成？
