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使得操作数的符号位不变的移位指令是 (58) 。
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软件维护是软件生命周期中的固有阶段，一般认为，各种不同的软件维护中以 (52) 所占的维护量最小。
阅读以下文字，完成下列问题。 “百家讲坛”其实是一个很奇怪的坛。十年以前，丁肇中在那里讲过物理学，把物理学讲到我都能听得津津有味，很不容易。但现在这个讲坛上，讲红楼、讲清史、讲论语，大概今后还要讲与“国学”有关的一切。至于还讲不讲自然科学、现代哲学、法学、政治学、经济学等，我不知道。在我印象中，“百家讲坛”之“百家”就是赏玩传统的百家，当然中国这方面的人才很多，号为“百家讲坛”，数量是可以保证的。 国学，据说已经“返本开新”，只差大家都来践行。不过，践行什么呢？是修习个人的心性，还是以国学来格致万物？若是前者，没有什么不好。若是后者，事情就比较难办。阎崇年先生讲清史，______，史料熟，秘闻多，吸引力强，但主要是对清宫如同对待自家一般热爱的态度，这个祖宗英明，那场屠杀合理。易中天先生讲三国，权谋机变，说得津津有味，就是搞不清对权谋之术到底是赞赏还是批判。相比之下，反倒是于丹讲《论语》，固然毛病多多，总归是修身养性，更加合乎人性，但只强调指向内省而对人之外在处境无所置辞的讲法，大概不过是训育顺民。 这次钱文忠先生为商纣王翻案，称其“文武双全，功勋卓著”，以期主导舆论。前人多有怀疑商纣王并非恶到极点者，从真实认识而言，哪怕是希特勒，你也不难找出几个“功勋”来，商纣王当然也应该有一些好的地方。但到底有多好，难说，尤其在学术上“有一份证据说一份话”，就更困难。商纣王处在中国信史时代之前，怎样获得充分的证据来总括他的一生？对他的恶评有新朝代的虚报，有后时代的累加，但要翻案，还是且缓吧，重建一个对商纣王的历史结论，学术上几无可能。 对商纣王的评价，与其说是“历史评价”或者“历史学结论”，不如说是一种“舆论评价”或者“社会学结论”。想到商纣王就想到荒淫、暴虐，他已经成为一种暴虐的符号，不可置疑的事实是，商朝在纣王手中灭于周朝，一个“文武双全，功勋卓著”的帝王，怎样被一个新朝代取代，把这一点解释清楚，何其困难。 “百家讲坛”其实是娱乐业的一个景象，但貌似在布道。在这种虚妄的布道与实在的娱乐之间，人们听到一些离奇古怪的想法，并且把自己酱在莫名其妙的逻辑里。这些逻辑归总而言，就是“大丈夫只求建功立业，不必论其余；小百姓但求修好忍术，以接受治理”。寓教于乐，就这样实现了。 本文作者对百家讲坛的态度是______。
案例分析题在Windows操作系统的资源管理器窗口中，为了将选定的硬盘上的文件或文件夹复制到软盘，应进行的操作是（）。在“我的电脑”窗口中，若已选定硬盘上的文件或文件夹并按了DEL键和“确定”按钮，则该文件或文件夹将（）；已放入回收站的文件可以通过操作（）来恢复。 在“我的电脑”窗口中，若已选定硬盘上的文件或文件夹并按了DEL键和“确定”按钮，则该文件或文件夹将（）
In the 1960s, medical researchers Thomas Holmes and Richard Rahe developed a checklist of stressful events. They appreciated the tricky point that any major change can be stressful. Negative events like "serious illness of a family member" were high. on the list, but so were some positive life-changing events, like marriage. When you take the Holmes-Rahe test you must remember that the score does not reflect how you deal with stress--it only shows how much you have to deal with. And we now know that the way you handle these events dramatically affects your chances of staying healthy. By the early 1970s, hundreds of similar studies had followed Holmes and Rahe. And millions of Americans who work and live under stress worried over the reports. Somehow, the research got boiled down to a memorable message. Women’s magazines ran headlines like "Stress causes illness." If you want to stay physically and mentally healthy, the articles said, avoid stressful events. But such simplistic advice is impossible to follow. Even ff stressful events are dangerous, many--hke the death of a loved one- are impossible to avoid. Moreover, any warning to avoid all stressful events is a prescription (处方) for staying away from opportunities as well as trouble. Since any change can be stressful, a person who wanted to be completely free of stress would never marry, have a child, take a new job or move. The notion that all stress makes you sick also ignores a lot of what we know about people. It assumes we’re all vulnerable (脆弱的) and passive in the face of adversity (逆境). But what about human initiative and creativity Many come through periods of stress with more physical and mental vigor than they had before. We also know that a long time without change or challenge can lead to boredom, and physical and mental strain. The studies on stress in the early 1970’s led to ______.
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