Under the room temperature, PTMEG has the water absorptivity.在室温下, PTMEG都具有吸水性.Total absorptivity can be up to 98 % using second - order absorption - oxidation process.采用二级吸收 — 氧化流程,总的吸收率可达98%以上.The molar absorptivity of...
This is the Blue - throated, a beautiful bird and magnificent flyer.照片上这种是蓝喉的, 华美的一种鸟.In May of that year, Wilbur sailed to France to demonstrate their new Type A Flyer.那年5月, 威尔伯乘船到法国展示他们新型的“A型飞行器”.They were part of the ...
Objective : To explore clinical characteristics of chorea, to improve clinical diagnosis accuracy and to reduce misdiagnosis.目的:分 析小舞蹈病的临床特点, 以提高对小舞蹈病的认识,减少临床误诊....
prehistoric hunters and gatherers史前的狩猎者和采集者The earliest people were roving hunters and gatherers who made primitive stone tools.最早的居民是流动的狩猎者和聚居者,他们制作了一些原始的石器.The brazil nut gatherers were paid only 2 to 3 percent of the ...