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选择题在高考化学试题中占有十分重要的地位。在九五年高考化学题中选择题共26题,满分84分,占试卷全部题量36题的72％,占总分150分的56％。因此,熟悉选择题的特点,掌握解选择题的技巧,是提高解题效率和高考得分率的关键一环。 今以九五年高考化学选择题为例,谈一下速解方法。 MCE、二、18(即第二大题第18小题,以下同):在一定温度下,可逆反应达到平衡的标志是: (A)C生成的速度与C分解的速度相等。 (B)单位时间生成n摩A,同时生成3n摩B。 (C)A、B、C的铱度不再变化。 (D)A、B、C的分子数比为1∶3∶2。
The multiple-choice question occupies a very important position in the college entrance examination chemistry test. In 1995, the multiple-choice questions in the college entrance examination chemistry questions consisted of 26 questions, out of 84 points, accounting for 72% of the total 36 questions in the examination papers and accounting for 56% of the total scores of 150 points. Therefore, to be familiar with the characteristics of multiple-choice questions and to master the skills for solving multiple-choice questions is the key to improving the efficiency of problem solving and the college entrance examination score. Take the example of the chemical multiple-choice for the 1995 college entrance examination, and discuss the quick solution method. MCE, II, 18 (ie, the second topic of the 18th title, the following is the same): At a certain temperature, the signs that the reversible reaction reaches equilibrium are: (A) The speed of C generation is equal to the speed of C decomposition. (B) The unit time generates n A, and 3n B is generated at the same time. (C) The degrees of A, B, and C no longer change. (D) The molecular ratio of A, B, and C is 1:3:2.