题目

Your essay is quite good: just _____ it _____ with a few illustrations and quotations. A. put .. up     B. touch .. up   C. cut .. out    D. write .. off 答案：B 解析: 本题译文：你的文章很好；只要用些例证和引语修饰一下。 touch up(=improve or perfect by small additional strokes or alterations)润色，修饰：1)The last part of the article needs to be touched up.(这篇文章的最后一部分需要润色。) 2)He touched up the picture by strengthening and shadows.(他把画修饰了一下，使光明部分和阴暗部分的设NA为阿伏伽德罗常数的值，下列有关说法不正确的是A．45g水中含有的水分子数是2.5NAB．标准状况下，33.6LCO中含有的原子数是3NAC．0.5L0.2mol/L的NaCl (aq)中含有的Na＋数是0.1NA D．1molH2O中含电子数目为9NA