信息认证是保证信息安全的重要手段，它指信息接收者能够检验发送者的真实性和收到消息的 发布时间：2018-04-09 09:18 │ 来源：www.tikuol.com 题型：填空题 问题： 信息认证是保证信息安全的重要手段，它指信息接收者能够检验发送者的真实性和收到消息的 【1】 。
题型：填空题 患者李某，女，32岁，反复腹泻半年，3天前又发作，大便黄色稀便，带脓血，每天8～10次。大便常规：RBC+/HP，WBC+++/HP， PC+/HP。医生诊断为慢性菌痢，急性发作型。下列社区护理要点中，不正确的一项是A．患者的粪便应消毒后才能倒掉B．急性期应卧床休息，避免过度劳累C．饮食以高蛋白、多纤维的饮食为宜D．患者的食具、便盆应单独使用E．每次便后用温水清洗肛周 查看答案
题型：填空题 阅读下面短文, 根据所读内容在表格中的空白处填入恰当的单词。 注意：每个空格只填一个单词。 The word science is heard so often in modern times that almost everybody has an idea of its meaning. However, its definition is difficult for many people. The meaning of the term is confusing, but everyone should understand its meaning and objectives (目标). Just to make the explanation as simple as possible, suppose science is defined as classified knowledge or facts. Even in the true science, distinguishing fact from fiction is not always easy. For this reason great care should be taken to distinguish between beliefs and truths. There is no danger as long as a clear difference is made between temporary and proved explanations. For example, hypotheses(假设) and theories are attempts to explain natural phenomena. From these positions the scientist continues to experiment and observe until they are proved or discredited. The exact status of any explanation should be clearly labeled to avoid confusion. The objectives of science are primarily the discovery and later the understanding of the unknown. Man cannot be satisfied with recognizing that secrets existing in nature of those questions are unanswerable; he must solve them. Toward that end, specialists in the field of biology and related fields of interest are directing much of their time and energy. Actually, two basic approaches lead to the discovery of new information. One, aimed at satisfying curiosity, is referred to as pure science. Sometimes practicalminded people miss the point of pure science in thinking only of its immediate application for economic rewards. However, one should remember that the construction of the microscope had to come before the discovery of the cell. The scientists devoting their lives to pure science are not apologetic about ignoring the practical side of their discoveries; they know from experience that most knowledge is eventually applied. The other is aimed at using knowledge for specific purposes-for instance, improving health, raising standards of living, or creating new consumer products. In this case knowledge is put to economic use. Such an approach is referred to as applied science. The 1.________ of science 2.________ of science ● To define science, we may 3.________ call it classified knowledge or facts.● It is essential, though not 4.________, for us to distinguish fact from fiction. Objectives of science Science is 5.________ at discovering and understanding the unknown. Two basic 6. ________ to new discovery Pure science Scientists, who may be blamed for 7.________ the practicalside of their work, make discoveries out of 8.________. 9.________science Knowledge is put to economic 10.________, for example, improving health, raising living standards and creating new consumer products. 查看答案