单词：filter type smokemeter
单词：filter type smokemeter 相关文章
Lesson 38 Text A Can't She Type? The well-known banker, T. J. Ellington, was at one time in his younger days the manager of a New York office. His secretary had been with him for many years, and knew
初级口语教程
But the HEPA filter for Olivers Vibe got dirty very quickly. And, it was not cleanableit was simply replaceable. When it turned filthy brown, Oliver went back to Target to buy a new filter. Oddly, Target sold the F15 belt for the Vibe, but not the fi
365个英语简短小故事
From VOA Learning English, this is the Health Lifestyle report. In parts of India, it is not uncommon to see people wearing a mask over their nose and mouth. The capital, New Delhi, has some of the world's dirtiest air. The pollution was a call for a
2018年VOA慢速英语(一)月
吸烟有害健康(Smoking is hazardous to health。)。 常用表达： Have a smoke? 抽烟吗？ Help yourself to a cigarette. 请抽烟。 Would you like a cigarette? 想抽支烟吗？ Won't you have a smoke? 不想抽支烟吗？ Please have a
实用英语
Dohn,Surgical masks arent designed to protect you. Theyre designed to protect those around you from the germs you might be spreading, by blocking those droplets you shoot out when you sneeze or cough. Surgical masks also divert airflow so that you do
英语听力文摘 English Digest
By Tabinda Naeem Washington, D.C. 21 May 2007 Two years ago, the National Academy of Engineering established the Grainger Challenge Prize for Sustainability. This $1 million award was designed to challenge the world's scientists to develop a practica
2007年VOA标准英语（五月）