Explain why barium forms peroxide but beryllium does not.解释为什么钡能形成过氧化物而铍则不能。Common ceramic elements are barium titanate and lead zirconate - titanate.普通的陶瓷元件分别是钛酸钡和锆钛酸铅.There is reflux of barium into the terminal ileum.钡...
Even Finn the Red - Handed was dreaming of his doorsteps and empty hogsheads.连赤手大盗费恩都在缅怀他从前睡觉的台阶和那些大空桶.Rain drops were spattering on the doorsteps.雨点洒落在门阶上.At Halloween, you will see many jack - o'- lanterns doorste...
Suppose the width of a rectangle is x metres.设长方形的宽是x米.He handed me a little rectangle of white paper.他递给我一张小小的长方形白纸片。A squared rectangle is a rectangle dissected into at least two squares.方化矩形是指可以分割成至少两个正方形的矩形....
De Gaulle was a born pedagogue who used the public platform and the television screen to great effect.戴高乐生来喜欢教育人，他充分利用了公共讲坛和电视荧屏。Nothing is more tiresome than a superannuated pedagogue.老朽无能的学究最令人讨厌不过。My friend, because o...