单词：Houdry catalytic cracking process
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a great number of 许多，大量 center / centre 中心 different 不同的 firm 公司 have been there 去过那里 have been to 去过 receive 收到 receive... from 从 收到，收到
新概念英语第二册单词MP3
Four times a year, Ghez focuses the telescope on the stars of the very heart of our Milky Way. She is looking for the telltale high speeds that reveal the presence of a black hole. The center of the M
超大质量黑洞
How to find the center park Dear Mr Smith, We are so glad you are coming to join us on Saturday. Here you can find us.We will have a party in the center park.Maybe you have been there, haven't you ?The straight on you will be out of school get and co
高考英语作文高分必备
Topics: McJobs; Roberts Rules of Order; in for a dime, in for a dollar; a police officers beat, could versus would, center versus centre Words: McJob low-prestige advancement dead end to be regulated service industry turnover to polish McMansion coun
美语听力 English Cafe
British English may have come first, but around the world, the American way of spelling is now far more popular. 英式英语出现的较早，但从全球看，现今美式英语的拼写方式却更受欢迎。 A recent examination of these two var
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