填空题
发布日期:2021-03-22
在电信中,应答器可以是两种类型的设备之一。 在空中导航或射频识别中,飞行应答器是飞机中的自动收发器,其响应于询问的接收信号发出编码的识别信号。 在通信卫星中,卫星转发器通常通过卫星地面站的上行链路频率范围接收信号,放大它们,并将它们以不同的一组下行链路频率重新发射到地球上的接收机,通常不改变接收信号或信号。
a) 人、机器和方法的集合,用来实现一组规定的功能。b) 一个完整的整体,由种类不同的、相互作用的、专门的结构和子功能部件所组成。c) 由某些相互作用或相互依赖关系联合起来的小组或子系统,可执行多种职能,但是作为一个单位而发挥作用。——引自DL/T1142—2009《核电厂反应堆控制系统软件测试》
由李洵作词作曲、清风组合演唱的歌曲。
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请阅读 Passage 2,完成第 26~30小题。Passage 2Americans today don't place a very highvalue on intellect. Our heroes are athletes, entertainers ,and entrepreneurs, not scholars. Even our schools are where we send ourchildren to get a practical education-not to pursue knowledge for the sake ofknowledge. Symptoms of pervasive anti-intellectualismin our schools aren't difficult to find. "Schools have always been in a societywhere practical is more important than intellectual,"says education writerDiane Ravitch. "Schools could be acounterbalance. " Ravitch ' s latest book,Left Back: A Century of FailedSchool Reforms, traces the roots of anti-intellectualism in our schools,concluding they are anything but a counterbalance to the American distaste forintellectual pursuits. But they could and should be. Encouraging kids to reject the life of themind leaves them vulnerable to exploitation and control. Without the ability to think critically, todefend their ideas and understand the ideas of others, they cannot fullyparticipate in our democracy. Continuingalong this path, says writer Earl Shorris, "We will become a second-ratecountry. We will have a less civil society. ""Intellect is resented as a form ofpower or privilege," writes historian and professor Richard Hofstadter inAnti-Intellectualism in American Life, a Pulitzer-Prize winning book on theroots of anti-intellectualism in US politics, religion, and education. From the beginning of our history, says Hofstadter,our democratic and populist urges have driven us to reject anything that smellsof elitism. Practicality, common sense,and native intelligence have been considered more noble qualities than anythingyou could learn from a book. Ralph Waldo Emerson and otherTranscendentalist philosophers thought schooling and rigorous book learning putunnatural restraints on children: "We are shut up in schools and college recitation rooms for 10 0r15 years and come out at last with a bellyful of words and do not know a thing." Mark Twain ' s Huckleberry Finn exemplified Americananti-intellectualism. Its hero avoids beingcivilized-going to school and learning to read-so he can preserve his innategoodness. Intellect, according to Hofstadter, isdifferent from native intelligence, a quality we reluctantly admire. Intellect is the critical, creative, andcontemplative side of the mind. Intelligence seeks to grasp, manipulate,re-order, and adjust, while intellect examines, ponders, wonders, theorizes, criticizesand imagines. Schoolremains a place where intellect is mistrusted. Hofstadter says our country ' s educational systemis in the grips of people who "joyfully and militantly proclaim theirhostility to intellect and their eagerness to identify with children who showthe least intellectual promise. "We can learn from the text that Americans have a history of .
为什么有些疫苗需要加强免疫?
表现为心室壁非对称性增厚的是()。
男性,34岁,已婚,外阴部皮肤可见多处乳头状和菜花样皮损,活检见表皮角化不全,棘层明显肥厚,基底层细胞增生,表皮内有挖空细胞,核周有空晕且大而深染,不规则,可见双核,核膜结构不清晰。为明确诊断,可进一步检查()
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