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In Windows OS, in order to open the Start Menu, the shortcut is

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One famous OS of smart phone is.

One means of implementing time-sharing is to apply the technique called,in which time is divided into intervals and then the execution of each job is restricted to only one interval at a time.

1．证券公司在英国称投资银行，欧美大陆称之为商人银行。

A. 对
B. 错

2．证券市场机构主要包括证券公司、证券交易所、证券经纪人和证券结算中心。

A. 对
B. 错