我寄了信, 但留了份影印本存档.I sent the letter, but kept a copy for my files.比尔: 请将这份业务记录影印本交给苏.Bill: Please give this photocopy of sales report to Sue.请填身份证之号码并附上影印本.Enter the number of your I. D . Card and enclose a photocopy....
从上到下,电负性减小,金属性增强.Metallic character increases down Group 16 as electronegativity decreases.提出了一种分析电负性气体中电子崩发展过程的四参数模型.This paper investigated the process of avalanche growth in electronegative gas.并讨论了二价碘酸盐水化物的稳定性与阳离子电负性...