1964 年,Northover和Pearson在砷基铬化物(即 As-Te-I)中发现了电开关行为。1968年,S. R. Ovshinsky报道了非晶态 As30Te48Si12Ge10的可重复双向阈值开关(OTS)现象,并发现了若将砷的浓度...
Beautiful scenery of Hongyuan [Photo via Hejiang County-level converged media center] The Moon River Scenic Area in Hongyuan was selected as a national 4A-level tourist attraction in 2017. The Gaqu River meanders through here, resembling a crescent...
A deathly silence falling,we cast a glimpse at that envelope and then at each other. (盐城卷) 2.轻声说 Puzzled but excited, our son leaned forward first, held the envelope gently with a cheery smile, andwhispered in a trembling voice, “Mom, I can ...
Again, if we overtighten and we don't want to -\- we want to get this exactly right.But if we overtighten, thenwe have the ability with our tools, which are powerful,as we s...
patient escort provides, as well as some tips for a quick and convenient medical consultation,” Zhang Tian said. At first, she was a little worried that her video would go...
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