对于吸毒成瘾严重，通过社区戒毒难以戒除毒瘾的人员，公安机关可以直接作出强制隔离戒毒的决定。以上说法正确吗？（）
A、正确
B、不正确
参考答案：A
He said that his bike _____ stolen and he _____ telephone the police.
A．was; would have to
B．has; will have to
C．has been; will have got to
D．had been; would have to
试述“经济人”、“社会人”的基本观点，及相应的管理策略。
