水溶液

Two Australians, Mack and Jill, are camping on Kangaroo Island. M: Look! There's a koala hugging a tree. They're really so cute. Jill, why are you crying? J: The government's planning on killing them

发表于:2018-12-08 / 阅读(214) / 评论(0) 分类 赖世雄中级美国英语

pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con

发表于:2019-01-03 / 阅读(59) / 评论(0) 分类 医务英语

本期真题 1.If tap water were as dangerous as some people think, ________ would be getting sick. A) a lot of more us B) more a lot of us C) a lot of us more D) a lot more of us 2.Living in the cent

发表于:2019-01-08 / 阅读(43) / 评论(0) 分类 英文语法词汇

By Cathy Majtenyi Nairobi 19 May 2008 Fuel efficient stoves and ceramic water purifiers are two examples of low-tech innovations that can help people in poor countries improve their quality of life. Because what is known as appropriate technology usu

发表于:2019-01-10 / 阅读(62) / 评论(0) 分类 VOA标准英语2008年(五月)

Your last colonoscopy was 10 years ago, Dr. Carter said. It's time for another one. Bruce made an appointment for another one. He received prescriptions for a laxative and a plastic gallon jug. The jug contained electrolytes. The day before the colon

发表于:2019-01-22 / 阅读(62) / 评论(0) 分类 英文短篇故事(纽约)

BEIJING, Feb. 14 (Xinhua) -- Chinese Premier Wen Jiabao said Tuesday that China has been ready for a bigger part in the resolution of the European sovereign debt issue. Wen made the remarks when meeting reporters with European Council President Herma

发表于:2019-02-18 / 阅读(59) / 评论(0) 分类 英语新闻