[00:00.00] unit 14 Mainly Revision [00:34.51]Ann___(not,watch)TV last night.The children__(go)to the farm last Saturday. [00:47.86]The boys__(meet)after school yesterday afternoon. [00:53.42]Mr Turner__(say)sorry to the conductor on the train because

发表于:2018-12-10 / 阅读(122) / 评论(0) 分类 (人教版)初中二年级上册

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Just when you thought youd heard everything, scientists have found that the reason you can hear everythingincluding things that are very quietis because

发表于:2018-12-24 / 阅读(46) / 评论(0) 分类 Scientific American(四)月

The 2009 Nobel Prize in Chemistry goes to Venkatraman Ramakrishnan of the MRC Laboratory of Molecular Biology in England, Yale Universitys Thomas Steitz, and Ada Yonath of the Weizmann Institute of Science in Israel for their studies of the ribosome.

发表于:2019-01-08 / 阅读(67) / 评论(0) 分类 Scientific American(十)月

[00:11.60]WARMING UP [00:16.04]How many new uses can you think of for the folowing items? [00:36.49]reminds us of the appearance of nanotechnology, [00:53.76]according to which nothing is useless and [01:04.91]no garbage or waste material to speak of

发表于:2019-01-10 / 阅读(165) / 评论(0) 分类 高中英语人教版高一年级

Antibiotic Alternative Treats Urinary Infection in Mice Researchers have a new approach for treating urinary tract infections, a painful condition which can often be treated successfully with antibiotics. But many times, the infection is caused by st

发表于:2019-01-13 / 阅读(51) / 评论(0) 分类 VOA标准英语2011年(十一月)

This years Nobel Prize in Chemistry is about the worlds smallest machines. G?ran Hansson, secretary general of the Royal Swedish Academy of Sciences, earlier this morning. The Royal Swedish Academy of Sciences has decided to award the 2016 Nobel Priz

发表于:2019-01-17 / 阅读(78) / 评论(0) 分类 2016年Scientific American(十)月