简介:AnewtypeofcomplexsolidsuperacidcatalystWO3-ZrO2-SO42-withanacidstrengthH0≤-16.04waspreparedbykneadingZr(OH)4oramorphousZrO2withtungsticacid(H2WO4)(W/Zr=0.15),followedbyexposingthiscomplexhydroxidesto0.5tool/LH2SO4,calcininginairat700~800℃for3h.ThiscatalystpossessesbothstrongBronstedacidityandstrongLewisacidityexperimentallyshowedbyIRobservationofpyridineabsorbedonit.XPSandAEStechniqueswereemployedtoexaminethevalencestatesoftungsten,zirconium,sulfurandtheirinteractions.Thestructureofsulfurspecieswasstudiedbyinfraredspectroscopyandastructuremodelofactivesitewasproposedupontheseresults.
简介:so...that...结构与sothat结构之间,初看起来只是标点符号不同,其实它们的'分合'用法也有着很多不同之处。在'语法展示台'里,我们一起来看看它们有哪些不同吧。一、比一比句式的结构1.so...that...是引导结果状语从句的连词。so可修饰用作表语的形容词原级或用作状语的副词原级,用来表示程度。选用形容词还是副词取决于so前面的谓语动词,若是系动词,so一般用来修饰形容词。如:
简介:一、so+助动词/be+主语,译为“同样、也是”。1.HewillgotovisitQingdaotomorrow,sowillshe.2.Ihavesomethingimportanttotellyou,sodoeshe.3.——Wouldyouliketocomeandattendthemeeting?——IfTomdoesso,sowillI.注:在if条件句中,so的倒装要遵循主句用一般将来时,从句用