考前必看:2021年考研英语工学类阅读理解模拟题及答案(十九)

发布时间:2020-10-12


最近,有小伙伴在询问最后阶段,考研英语该如何备考才最有效。最后阶段,我们应该将备考的重点放在复习和了解考试上,多去练习历年真题和模拟试题。下面,51题库考试学习网为大家带来考研初试的一些模拟试题,一起来看看吧。

Muffin Man has more than 2000 songs on his hard drive and he\'s happy to share them. He\'s a big fan of bands like Pearl Jam and the White Stripes so there\'s plenty of hard rock in his collection.

But chances are you\'ll never get to it. The 21-year-old pizza cook who asked to be identified by his online nickname makes his songs available only through private file-sharing networks known as darknets. Unlike such public networks as Kazaa or Morpheus which let you share songs with anyone private networks operate more like underground nightclubs or secret societies. To gain access you need to know the name of the group and a password. And the only way to get that information is from another member who invites you in. Some darknets even encrypt files and mask your identity within a group to keep eavesdroppers from finding out who you are and what you are sharing.

It\'s a handy invention now that the recording industry has taken to suing kids who share music online. But darknets are not just for digital music files. Carving out a bit of privacy online has wide appeal; students community groups and even political dissidents can use these hidden networks to share projects papers and information. One part of the allure is anonymity; the other is exclusivity. Since participation is limited file searches don\'t turn up a lot of junk or pornography. Darknets offer the convenience of the Web without a lot of the bad stuff.

You need special software to start a darknet of your own. The two most popular programs are Direct Connect by NeoModus (at neomodus.com) and an open-source variation of it called DC++ available at sourceforge.net. More than 800000 copies of DC++ have been downloaded since mid-July. A third program called Waste (also at sourceforge.net) automatically encrypts files but is much harder to use.

There are no good estimates of how many people use darknets. Lowtec a college sophomore studying computer engineering figures that 10% of the students at his school (which he declined to name) share files through Direct Connect. It\'s much faster than Kazaa,” he says. That\'s because private networks typically link small close-knit communities in which all members have superfast connections.

The recording industry so far hasn\'t put much effort into combatting the secret networks but its neglect might not last long. If networks like Kazaa become too risky darknets could quickly rise to take their place. And if that happens the music industry could find itself chasing users who are that much harder to catch.

(1):本文选自Time;9/29/2003 p78-78 2/3p 1c;

(2):本文习题命题模仿对象2002年真题text 412(12)text 22 (3)text 345(45);

1. From the first two paragraphs we learn that__________.

[A] Muffin Mans songs will be available if you know his online nickname

[B] Outsiders can not visit darknets without the invitation from a member

[C] Kazaa is to darknets what police is to underground world

[D] Its impossible for people to find out your true identity on the darknets

2. Which of the following statements is true according to the text?

[A] Darknets are being accused by the recording industry of allowing kids to share music online.

[B] People use darknets to share music mainly.

[C] One advantage of darknets is that people can avoid reading unwanted information.

[D] Users of private networks are mostly students.

3. The word allure (Line 4 Paragraph 3) most probably means____________.

[A] advantage

[B] achievement

[C] feature

[D] appeal

4. We can draw a conclusion from the text that ___________.

[A] darknets may become a headache of the music industry

[B] the age of darknets is within reach

[C] darknets may excel Kazaa in the number of its users very soon

[D] the music industry will lose the battle against darknets

5. From the text we can see that the write seems__________.

[A] positive

[B] negative

[C] doubtful

[D] uncertain

答案:BCDAA

以上就是51题库考试学习网为大家带来的全部内容,希望能给大家一些帮助。51题库考试学习网提醒:2021年考研正式报名已经开始,在预报名阶段未来得及报名的小伙伴要注意了。另外,小伙伴们如果还有其他关于考研信息的疑问,也可以留言咨询哦。


下面小编为大家准备了 研究生入学 的相关考题,供大家学习参考。

下面心理学家提出的理论可以作为学校中奖优制度根据的是

A.布鲁纳
B.斯金纳
C.托尔曼
D.罗杰斯
答案:B
解析:
斯金纳提出的理论是强化理论,强调奖励在学生学习中的作用。布鲁纳强调内在动机在学习中的作用。托尔曼认为强化不是影响学习的关键因素。罗杰斯强调应使学生认识到学习内容对个人的价值,从而推动他们学习。

某校进行了一项通过反思活动提高学生知识迁 移能力的实验。研究者将高中一年级的5个自然班,用抽签的方法决定其中一个班为实验班, 另一个班是对照班(控制班)。实验前对两个班 学生的知识迁移能力进行了统一测试。实验开 始后,两个班级使用同样的教材、保持同样的进 度。对照班以常规方式进行教学,但对实验班每 节课提供5分钟的反思练习,并布置一定量的课 外反思作业,要求学生按时完成。持续一个学期 后,用统一测试的方法测出实验班的学生知识迁 移能力明显优于对照班。 (1) 该实验研究采用了何种设计类型? (2) 该实验的研究假设是什么? (3) 该实验中的自变量、因变量和无关变量有 哪些? (4) 该实验设计存在哪些优、缺点? (5) 该类型实验研究报告包括哪些基本要素?

答案:
解析:
(1)该实验采用的设计类型为:非随 机分派控制组前后测设计。 (2) 该实验研究的假设是:反思教学活动可 以提髙学生知识迁移能力。 (3) 自变量:对学生进行的反思教学活动 (包括每节课5分钟的课堂反思练习及课外反思 练习)。 因变量:学生的知识迁移能力。 无关变量:实验班教师与对照班教师的教学 水平、教学风格;由于非随机分派造成的两个裹 学生本身的特征差异(包括学习成绩髙低、学习 风气、学习能力等的不同);被试的缺失;学生成 熟度的影响;历史的影响等。 (4) 优点:有控制组,有前后测比较,可以控 制成熟、历史、测验、工具、统计回归等因素的影 响,能在一定程度上控制被试选择的偏差,从而 提高研究的内部效度。 缺点:没有完全采用随机方式分派被试,选 择与成熟、选择与历史的交互作用可能降低实愛 内在效度;如果两组被试选择不当,可能造成绞 计上的误差。在外部效度方面,不能控制测验的反作用或交互作用效果,也不易控制选择偏差、 实验安排造成的反作用效果。 (5)该类型实验报告应主要包括: 题目:指明研究的主要变量。 前言:包括提出问题、表明研究目的;对已有 研究的综述以及对本选题依据、研究意义的描 述;该研究所要解决的问题及研究的理论框 架等。 研究方法:包括核心概念界定,被试的条件、 数量、取样方法。实验设计,包括实验组与控制 组的情况,研究的自变量及无关变量等的控制等。实验程序,包括实验步骤的安排、实验时间 的选择等,资料数据的搜集和分析处理,实验结 果的检验方式。 实验结果:这是研究报告的主要组成部分, 要求简要说明每一结果与研究假设的关系,客观 呈现研究结果。 参考文献和附录。

催化聚合酶链反应的酶是

A. DNA连接酶
B. DNA聚合酶
C.反转录酶
D.末端转移酶
答案:B
解析:

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