49、最常用的身份认证技术是______。A.口令或个人识别码B.指纹认证C.人脸图像识别D.数字签名技术 - 查题网

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高等继续教育 / 计算机统考

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49、最常用的身份认证技术是______。
A.口令或个人识别码
B.指纹认证
C.人脸图像识别
D.数字签名技术

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计算机统考

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35、Although English is not as old as Chinese, it is spoken by many people around the world every day. English speakers are always creating new words, and we are often able to know where most words come from. Sometimes, however, no one may really know where a word comes from. Did you ever think about why hamburgers are called hamburgers, especially when they are not made with ham（火腿）? About a hundred years ago, some men went to America from Europe. They came from a big city in Germany called Hamburg. They did not speak good English, but they ate good food. When some Americans saw them eating round pieces of beef, they asked the Germans what it was. The Germans did not understand the question and answered, "We come from Hamburg." One of these Americans owned a restaurant, and had an idea. He cooked some round pieces of beef like those which the men from Hamburg ate. Then he put each between two pieces of bread and started selling them. Such bread came to be called "hamburgers". Today "hamburgers" are sold in many countries around the world. Whether this story is true or not, it certainly is interesting. Knowing why any word has a certain meaning is interesting, too. This reason, for most English words, can be found in any large English dictionary.统考英语阅读理解

由来自正态总体X～N (μ， )、容量为400的简单随机样本，样本均值为45，则未知参数μ的置信度为0.95的置信区间是( )(A)(44，46)(B)(44.804，45.196)(C)(44.8355，45.1645)(D)(44.9，45.1)[参考答案：B] 分值：4得分：分杨秋霞批改于2020年7月2日 0点49分概率论与数理统计

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