压缩比

New data show that when bystanders without emergency medical training try CPR using only chest compression, the results can be better than if they also attempt mouth-to-mouth. Christopher Intagliata reports 看见身边有人突然倒了, 想救人家

发表于:2018-12-07 / 阅读(137) / 评论(0) 分类 60秒科学

1849 、 静摩擦 staticfriction 1850 、 颈轴承 journalbearing 1851 、 颈缩 necking 1852 、 频带宽度 bandwidth 1853 、 频率 frequency 1854 、 头座 headstock 1855 、 阈值;临界值

发表于:2018-12-08 / 阅读(55) / 评论(0) 分类 英文名句短语

1.Computer-Aided Manufacturing(CAM) 计算机辅助制造 A: Is CAM used in China? B: Yes,it has been uesd in China for almost twenty years. A:在中国有使用CAM的吗? B:有啊,在中国使用已经将近20年了。 2.Hot working 热加工 A: What are the hot working proc

发表于:2018-12-26 / 阅读(71) / 评论(0) 分类 天天商务口语

D type Channel Bank A D type channel bank is channel termination equipment used for combining (multiplexing) individual analog channel signals on a time division basis. D type channel banks provide in

发表于:2019-01-03 / 阅读(70) / 评论(0) 分类 电信英语

Study finds chest compressions are the real life-saver Art Chimes | St. Louis, Missouri 29 July 2010 Cardiopulmonary resuscitation, or CPR, has been around in its modern form for about 50 years. Its rhythms of chest compressions and mouth-to-mouth br

发表于:2019-01-13 / 阅读(65) / 评论(0) 分类 VOA标准英语2010年(七)月

BEIJING, May 13 (Xinhuanet) - China's central bank announced on Saturday it would lower the reserve requirement for commercial lenders by 50 basis points, the second time it has taken such action this year to inject more market liquidity and shore up

发表于:2019-02-04 / 阅读(82) / 评论(0) 分类 英语新闻
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