()者喜欢过高地估计自己.
A.自傲
B.自知
C.自卑
D.自乐
参考答案:A
Duty is an act or a course of action that people _______ you to take to by social customs,law or religion. [ ]
A. persuade
B. request
C. instruct
D. expect
简述罐头食品按pH分类的标准。