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问题 单项选择题

用户使用操作系统通常有三种方式，它们是终端命令、系统调用命令和：

A．计算机指令

B． 宏命令

C．作业控制语言

D． 汇编语言

答案

参考答案：C

解析：用户使用操作系统通常有3种方式，它们是终端命令、系统调用命令和作业控制语言。

单项选择题

Scott LaRue is a portfolio manager for Washington Advisors. Washington has developed a proprietary model that has been thoroughly researched and is known throughout the industry as the Washington model. The model is purely quantitative and screens stocks into buy, hold, and sell categories. The basic philosophy of the model is thoroughly explained to clients. The director of research frequently alters the model based on rigorous research-an aspect that is well explained to clients, although the specific alterations are not continually disclosed. Portfolio managers then make specific sector and security holding decisions, purchasing only securities that are indicated as "buys" by the model. LaRue has conducted some research on his own and feels the model would be improved by adding some factors. Based on his research, he applied his own version of the model, which is occasionally in conflict with the Washington model. LaRue discloses his model to his own clients but not to his supervisor. LaRue is:（）

A. violating the Standards by not considering the appropriateness of the recommendations to clients.

B. violating the Standards by not being objective.

C. violating the Standards by not having a reasonable and adequate basis for his investment recommendation.
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选择题
4名男生和4名女生排成一排，女生不排在两端，不同的排法数为（　　）
A．
A24
A44
B．
A44
A44
C．
A24
A66
D．
A88
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