About 2,300 years ago,there lived in Greak a great thinker n_____ Aristotle.About 2,300 years ago there lived in Greek a great thinker named Aristotle.He observed that feathers fell to the ground much more s_____ than stones.He concluded that heavy o

是at about ten years 还是for about ten years for about three years(提问) 已知Ag(NH3)2+ /Ag 的不稳常数和Ag+/Ag电极电势求Ag(NH3)2+ /Ag电极电势 比较Ag(NH3)2/Ag,Ag(S2O3)2^3/Ag,Ag(CN)2-/Ag,AgBr/Ag,AgCl/Ag标准电极电势大小 1.Everyone is about 2 years old.2.All of them are about 2 years old.有这2种说法么? it was eight years ag和that was eight years ago有区别吗? from 400 years ago和about 400 years ago 区别 [Ag(NH3)2]+是什么 ag. 无机化学电极电势题求解析Ag+/Ag AgI/Ag Ag(CN)2/Ag Ag(NH3)2/Ag哪个电极电势代数值大 make a 2 minutes presentation about you plans next 5 years我要作文 改同义句：we began to study here about 2 years ago.=we( )( )here( )about two years ago等等1.we began to study here about 2 years ago.=we( )( )here( )about two years ago2.I borrowed a book from Daniel.=Daniel（）a book（）（）.=Daniel（ how about your life in(r )years it was about 100 years ago Two years ago.about i love you. About 2,300 years ago,there lived in Greak a great thinker n_____ Aristotle.About 2,300 years ago there lived in Greek a great thinker named Aristotle.He observed that feathers fell to the ground much more s_____ than stones.He concluded that heavy o Jam about 7 years old.保持句意Jam ____ ____ about 7 years old. we lived in London for about three years?用for about three years提问