问答题 通过________ 可以把要保密的数据对无权存取的用户隐藏起来，从而自动地对数据提供一定程度的安全保护。

单项选择题 Questions 16 to 20 are based on the following reading passage.  Reading comprehension Researchers in the field of psychology have found that one of the best ways to make an important decision, such as choosing a university to attend or a business to invest in, involves the utilization of a decision worksheet. Psychologists who study optimization compare the actual decisions made by people to theoretical ideal decisions to see how similar they are. Proponents (支持者）of the worksheet procedure believe that it will yield optimal, that is, the best decisions. Although there are several variations on the exact format that worksheets can take, they are all similar in their essential aspects. Worksheets require defining the problem in a clear and concise way and then listing all possible solutions to the problem. Next, the pertinent considerations that will be affected by each decision are listed, and the relative importance of each consideration or consequence is determined. Each consideration is assigned a numerical value to reflect its relative importance. A decision is mathematically calculated by adding these values together. The alternative with the highest number of points emerges as the best decision. Since most important problems are multifaceted (多层面的），there are several alternatives to choose from, each with unique advantages and disadvantages. One of the benefits of a pencil and paper decision-making procedure is that it permits people to deal with more variables than their minds can generally comprehend and remember. One the average, people can keep about seven ideas in their minds at once. A worksheet can be especially useful when the decision involves a large number of variables with complex relationships. A realistic example for my college students is the question “What will I do after graduation?” A graduate might seek a position that offers specialized training, pursue an advanced degree, or travel abroad for a year. A decision-making worksheet begins with succinct (简洁的）statement of the problem that will also help to narrow it. It is important to be clear about the distinction between long-range and immediate goals because long-range goals often involve a different decision than short-range ones. Focusing on long-range goals, a graduating student might revise the question above to “What will I do after graduation that will lead to a successful career?” 16 Of the following steps, ______ is the one that occurs before the others in making a decision worksheet. A、listing the consequences of each solution   B、calculating a numerical summary of each solution  C、writing down all possible solutions   D、deciding which consequences are most important

问答题 幼儿出生后就开始认识世界，其对世界最初的认知活动，表现在          发生和视觉、听觉的集中。

单项选择题 方法研究主要内容包括（）。 A、程序分析、作业分析、操作分析 B、程序分析、作业分析、动作分析 C、动作分析、时间研究、程序分析 D、工作抽样、作业分析、动作分析

多项选择题 气缸的损伤形式包括（              ）。 A、机械磨损   B、磨料损伤   C、化学腐蚀   D、外力损伤 A、机械磨损 B、磨料损伤 C、化学腐蚀  D、外力损伤

判断题 职业是一个有报酬的连续性的社会活动

单项选择题 不属于路拱的基本形式的是（   ）A、圆顶形 B、抛物线形 C、屋顶线形 D、折线形

单项选择题 李某，停经8周，阴道少量流血半天，来院检查后诊断为葡萄胎。支持该诊断的是哪项检查结果高于正常A. 雌激素B. 孕激素C. 绒毛膜促性腺激素D. 促卵泡素E. 雄激素

单项选择题 食品生产经营者未依照本条规定召回或者停止经营的，（）可以责令其召回或者停止经营。A、国务院食品药品监督管部门B、县级以上人民政府食品药品监督管理部门C、县级以上地方人民政府

判断题 水泥混合砂浆配合比设计需一步步通过计算求得。