对黄金投资分析师诚信的具体要求是什么？
参考答案：
1.忠诚所属企业
2.维护企业信誉
3.保守企业秘密
4.遵章守制，秉公办事
—Your father's back home now, _____ he?
—Yes, he _____ been at home for half an hour. [ ]
A. isn't, has
B. hasn't, has
C. hasn't, is
D. isn't, is
决策的概念
