Is oxygen are the only gas____ helps fire burn?

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• Is oxygen are the only gas____ helps fire burn?
• 英语 定语从句 1.The speaker spoke of some writers and some books___were popular then.A.\ B.that C.which D.who.1.Is oxygen the only gas ___helps fire burns?A.\ B.that C.which D.it.3.He tore up my photo and ___upset me.A.whose B.that C.which D.who4.A desktop computer is a computer ___is designed for ude on the desk.A.whose B.where C.which D.who5.This is the best hotel in the city___I know.A.where B.that C.which D.it.做好把句子翻译一下。
• Is oxygen the only gas( ) helps fire burn?Is oxygen the only gas( ) helps fire burn?A.it B.which C.不填 D.that
• Is oxygen are the only gas____ helps fire burn?A.thatBwhichC.it为什么不能选B?
• 有关高一英语定语从句的三道选择题1.The knife [ ]we used to cut the bread is very sharpA.which B.with that C.with it D.with which2.You may take anything useful [ ]A.which you want B.you want them C.what you want D.you want3.Is oxygen the only gas[ ]helps fire burn?A.it B.which C./ D.that
• Is oxygen the only gas( ) helps fire burn?
• 小灯泡的电阻为20欧.在正常工作时两端电压为12V.现有的电源电压是18V,要把这盏灯接在这个电源上,
• it was said ( )was how the fire broke out.