5-1三相异步电动机的结构、额定值和主要系列 5-2 三相异步电动机的工作原理及转差率 5-3 三相异步电动机的主磁通和漏磁通 5-4 三相异步电动机转子静止时的电磁关系 5-5 三相异步电动机转子旋转时的电磁关系 5-6 三相异步电动机的功率和转矩 5-7 三相异步电动机的工作特性和参数测定

1-1潮汐和潮汐能 一、什么叫海洋能?它包括哪些能? 二、海洋能的分类? 三、海洋能的特点是什么? 四、中国的海洋能资源情况 五、何为潮汐?潮汐能的定义? 六、潮汐能的分类

Part I vocabulary and structure: 30% A: make the best choice 1. she was able to cope the difficulties she met with A in B with C. of d. to 2. Would you mind the radio? A not turn on B. not to turn on C. not turning on D. not turned on The lion is a of courage bol B sign C. mark D anima

Part I Reading(40%) Every human being, no matter what he is doing, gives off body heat. The usual problem is how to dispose of it. but the designers of the Johnstown Campus of the University o Pittsburgh set themselves the opposite problem how to collect body heat. They have designed a collection system which utilizes not only body heat, but the heat given off by such

Make the best choice: 1.She was able to cope----- the difficulties she met with. a. in b. with. of.to 2. Would you mind ---- the radio? a. not turn on b. not to turn on. not turning on d. not turned on 3.The lion is a ---- of courage. a. symbol b. sign c. mark d. animal

Part L Reading comprehension (40% Directions: There are some tasks for you to fulfill. You should read the materials carefully and do the tasks as you are instructed Task 1 (10%) Directions: After reading the following passage, you will find 5 questions or unfinished statements. For each question or statement there are 4 choices marked a)

Part I Reading Comprehension (40%) Task 1 Directions: Choose the best answer from the 4 choices Air pollution can spread from city to city. It even spreads from one country to another. Some northern European countries have had\black snow\ from pollutants that have traveled through the air from other countries and have fallen

Related Information Rock music emerged during the mid- 1950s to become the major popular musical form of young audience in the United States and Western Europe. Its stylistic scope is too broad to be encompassed by any single definition; the only feature common to all rock music is a heavy emphasis on the beat

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Related Information 1. 1. Opinion polls A survey of porential voters to determine their mood and attempt to determine the outcome of the election. Opinion polls started to play a part in American polities in the 1930s when the Gallup poll predicted the election of President Roosevelt in 1936