the bunsen burner is so named because it is thought----by robert bunsen,who was german by birthhaving been invented to have been invented 为什么用不定式形式?不定式不是表示一次性或目的吗?

3.The Bunsen Burner is so named because it is thought ___________ by Robert Bunsen. 改错The Bunsen burner is so named because it is thought to be invented bu Robert Bunsen,who was GerThe Bunsen burner is so named because it is thought to be invented bu Robert Bunsen,who was German by birth. 请问本句中is so named是什么意思?The Bunsen Burner is so named because it is thought to have been invented by Robert Bunsen.这句话里is so named是什么意思?是很出名的意思吗? the bunsen burner is so named because it is thought----by robert bunsen,who was german by birthhaving been invented to have been invented 为什么用不定式形式?不定式不是表示一次性或目的吗? 过去分词作宾补的The Bunsen burner is so named because it is thought ______ by Robert Bunsen.A invitedB to have been invited我想知道B怎么错?B是不定式完成被动式,也表示被动,也表示完成啊,这种情况下如何判断不 Burner is not 关于Mg在Bunsen burner火中的反应如果把一小条Mg放在Bunsen　burner火焰中,Mg会产生耀眼的白色光芒.Mg是和什么物质产生反应的?是Bunsen　burner里碳氢化合物（CH4）和氧产生的二氧化碳(CO2)还是氧气(O put on the back burner是什么意思 two-out-of-three 例句：The burner trip system recommended is a two-out-of-three system with three burners and three flame-failure detectors. X BURNER burner blocks中文翻译 谁能解释一下Bunsen coefficient的基本概念~ Put your _____ area from an accident under __________ water is wrong.A.burned;warm runningB.burner;running warmC.burning;warm runningD.burning;running warm 英语翻译请帮我翻译一下an electric arc between electrode bottom and burner body allow burner ignition during burner X BURNER AIR的中文意思 感觉语法好奇怪阿.我语法太烂了,还请高人赐教.it's refreshing in a blockbuster thriller such as CODEX that one doesn't have to put one's intelligence on the back burner. 英语翻译Don’t Skimp on This Calorie-Free Calorie Burner. 家庭教师27的X BURNER AIR 和X BURNER 有什么差别不要说多了一个AIR