根据短文阅读理解，选择正确答案。

      A good way to pass an examination(考试) is to work hard every day in the year. You may fail in the examination if you are lazy for most of the year and then work hard only a few days before the examination. If you are taking an English examination, don’t learn only rules of grammar.

      Try to read stories in English and speak in English whenever you can. A few days before examination you should start going to bed early. Do not stay up late at night studying and learning things. Before you start the examination, read carefully over the examination paper. Try to understand the exact meaning of each question before you pick up your pen to write. When you have at last finished your examination, read your answers, correct any mistake that you see and make sure that you have not missed anything out.

如图所示是某反应前后的微观示意图，“ ”和“ ”表示两种不同的原子．则该反应(    )

阅读下文，回答相关问题。
      ①苏州园林栽种和修剪树木也着眼于画意。②高树与低树俯仰生姿。③落叶树与常绿树相间，花时不同的多种花树相间，这就一年四季不感寂寞。④没有修剪得像宝塔那样的松柏，没有阅兵式似的道旁树：因为依据中国画的审美观点看，这是不足取的。⑤有几个园里有古老的藤萝，盘曲嶙峋的枝干就是一幅好画。⑥开花的时候满眼的珠光宝气，使游览者感到无限的繁华和欢悦，可是没法说出来。