单词：prenex disjunctive normal form
单词：prenex disjunctive normal form 相关文章
Today's topic is active voice versus passive voice. Here's Brian from Iowa: It drives me crazy when people write in passive voice. How can I teach people how to tell the difference between passive and active voice and stay away from passive voice? Th
英语语法 Grammar Girl
《英语流行话题阅读:语境识词3500》Unit 16 什么是癌症?
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[Note: I originally covered this topic September 16, 2006. The transcript you see now on the page is a new version that was updated March 5, 2009. Some of the reader comments at the bottom relate to the earlier version.] Grammar Girl here. Today's to
英语语法 Grammar Girl
New Ebola Vaccine Proves Effective in Mice U.S. scientists have developed a new vaccine against the deadly ebola virus which has the potential to remain potent after years of storage. Ebola is one of the deadliest viruses known. It kills about nine o
VOA标准英语2011年(十二月)
A: Can you help me pick out a gift for my niece? B: Most normal little girls go wild over Barbie dolls. A: That sounds good. Let me see one. B: Here's the latest modelDigital Barbie. A: Oh, she's nice. How much is she? B: Why, she's only $29.95. A: W
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What's that loud, droning noise? Is it a telephone? Or maybe a pigeon? No, it's Smokey. This English cat might soon be named the world's loudest purrer after she made an official attempt at a world record. Smokey's strident purr was recorded as being
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