test4p2

Unit 4 test Next

Part I Script

Directions: Listen to the short dialogs, and then choose the correct answers to the questions. You will hear the recording twice. After the first playing, there will be time for you to choose the correct answers. Use the second playing to check your answers.

1. (Listen to the audio recording for the question.)

A. Because short slogans are refreshing.

B. Because short slogans can catch busy people's attention.

C. Because only short slogans are impressive.

D. Because the Coca-Cola

新托福模拟题

1. What aspect of the jellyfish does the professor mainly discuss ?

A.The major polyps of the Portuguese man o’war jellyfish.

B.The deadly types of jellyfish such as the Irukandji jellyfish

C.The makeup of the jellyfish and its defense mechanisms

D.The cnidoblasts of the jellyfish and what they are used for

2.According to the professor, how does the jellyfish’s gelatinous body form affect them ?

A.It allows them to glide through the water quickly

B.It protects them from dangerous predators

C.It helps guide them through the oc

新托福模拟题

1. What aspect of the jellyfish does the professor mainly discuss ?

A.The major polyps of the Portuguese man o’war jellyfish.

B.The deadly types of jellyfish such as the Irukandji jellyfish

C.The makeup of the jellyfish and its defense mechanisms

D.The cnidoblasts of the jellyfish and what they are used for

2.According to the professor, how does the jellyfish’s gelatinous body form affect them ?

A.It allows them to glide through the water quickly

B.It protects them from dangerous predators

C.It helps guide them through the oc

赵庄中心校导学案设计

学科：英语 4B Unit4 Drawing in the park 主备人： 授课人____

Step 1. Warming up & Free talk 1. Enjoy the song: Row your boat

Warming up : Enjoy the song: Row your

歌词： Row, row, row your boat, gently on the boat stream, merrily, merrily, merrily, life is

interesting. 2. T: Life is interesting. Last lesson, we went to the park. Today, we will go to another interesting Let’s go to another place – Dream Theatre. Let’s go. interesting place

3. T: Look! They need some actors for the new play. – Dream Do you want to have a try? T:

赵庄中心校导学案设计

学科：英语 4B Unit4 Drawing in the park 主备人： 授课人____

Step 1. Warming up & Free talk 1. Enjoy the song: Row your boat

Warming up : Enjoy the song: Row your

歌词： Row, row, row your boat, gently on the boat stream, merrily, merrily, merrily, life is

interesting. 2. T: Life is interesting. Last lesson, we went to the park. Today, we will go to another interesting Let’s go to another place – Dream Theatre. Let’s go. interesting place

3. T: Look! They need some actors for the new play. – Dream Do you want to have a try? T:

浅析2P、4P断路器在TN系统中的合理使用

摘要：在TN系统内，确保供配电安全的前提条件下，应该合理使用断路器极数。本文将从断路器极数、国家规范相关内容以及TN系统自身特点来探讨2P、4P断路器在TN系统中的合理使用。 关键词：2P、4P断路器；规范；TN系统

前言：TN系统在我国低压配电领域占据主导地位。在TN系统的设计中，通常已在建筑物总进线处做总等电位联结，部分设计人员没有能够针对该系统自身的特点而选用2P、4P断路器。下面我们将结合一栋高层住宅电源总进线箱到住户配电箱之间的系统图进行分析，见图1。

图1

1. 2P、4P断路器概述

依据规范《电气附件 家用及类似场所用过电流保护断路器 第1部分：用于交流的断路器》（GB10963.1-2005）中3.2.7内容，断路器的极指的是与主电路的一个独立的导电路径相连的断路器的部件，具有用来连接和断开主电路本身的触头。它不包括那些用来将各极固定在一起并使各极一起动作的部件。

2P断路器指能断开一组相线和中性线的二极断路器，常用在单相回路中。 4P断路器指能断开所有相线和中性线的四极断路器，常用在三相回路中。 2. 现行规范针对保护电器设置的一些要求

2.1 《低压配电设

Test 2

LISTENING SECTION 1 Questions 1-10 Questions 1-5

Choose the correct letter, A, B or C. Example How long has Sally been waiting? A five minutes B twenty minutes C thirty minutes

1 What does Peter want to drink? A tea B coffee

C a cold drink

2 What caused Peter problems at the bank? A The exchange rate was down. B He was late.

C The computers weren’t working.

3Who did Peter talk to at the bank? A The exchange rate was down B He was late.

C The computers weren’t working.

4 Who did Peter talk to at the bank? A a

Test of Lexicology 2

I. Each of the statements below is followed by four alternative answers. Choose the one that best completes the statement and put the letter in the bracket. 1. Which words belong to the functional words? ( A )

A. prepositions, auxiliaries, conjunctions B. articles, adjectives, pronouns C. adverbs, conjunctions, nouns D. prepositions, auxiliaries, verbs

2. _____ are bound morphemes because they cannot be used as separate words.

（ C ） A. Roots B. Stems C. Affixes

D. Compounds

3. A morpheme tha

Practice Test 4 (CET 4)

用时： 0:00:13

Part I??Writing (30 minutes)

Directions: For this part, you are asked to write a composition on the following topic. You should write at least 120 words and you should base your composition on the outline below: 1. Competition and Cooperation 文中应包括的要点：

1. 竞争是社会生活中的常见现象 2. 竞争和合作往往是同时存在的

3. 在提倡竞争的同时，我们也不能忘记合作

Competition is a common phenomenon in our social life. _______

And we often find competition and cooperation at the same time. _______ Whil

P2P信任模型论文

p2p电子商务中基于声誉的关系信任模型

摘要

近年来，P2P网络成为互联网中最受欢迎的应用系统之一。由于P2P网络的匿名性和开放性，交互的节点不能总是保证自己行为的可靠，使得节点之间缺乏相互信任，网络中资源质量不能较好保证。P2P网络的安全问题成了当前研究的热点，在研究现有的信任模型的基础上，借鉴目前比较流行的基于全局推荐的信任度计算方法，提出了一种基于声誉的关系信任模型。为了满足用户多样性的要求，用户在Agent的协助下以商品的信任值排序后选择自己满意的商品。商品的信任值包含启动信任值和经验信任值两部分，启动信任值由商品的声明属性与同类商品的实际属性和信任值对比获得，经验信任值由交易经历和用户评价获得，在计算经验信任值时，用动态时间窗口减少计算量，在全局范围评估评价可信度以降低恶意评价的影响。测试和计算结果表明启动信任值能让无评价或仅有很少评价的优质新商品能与信任度很高的商品合理竞争，比另外两种信任启动方法更适合电子商务系统，关系信任模型对恶意评价有较强的抵抗能力，提高系统交易的成功率。

关键词：P2P网络；电子商务；信任模型；声誉

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P2P信任模型论文

随着C／S网络应用的飞速发展，服务器的性能瓶