在采用历史数据法估算股票波动率σ时,由于股票波动是随机的,因此对于某个特定股票的预期波动率与其历史数据之间应该不存在关系,因此最好采用该股票所在行业的多个对比股票或全部股票的波动率方差平均值估算。()
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CPA在了解被审计单位及其环境(不包括内部控制)调查表时,在记录了解被审计单位的具体业务内容时,如果涉及到多个项目,可以综合考虑并予以记录。()
_______ today, he would get there by Friday。
A. Would he leave
B. Were he leaving
C. Were he to leave
D. Had he left
The Atlantic Ocean is one of the oceans that separate the old world _______ the new。
A. in
B. away
C. to
D. from