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顺序选择题是一种比较常见的题型,诸如化学量大小顺序、速度快慢顺序、实验操作先后顺序、活动性前后顺序等均属此列。在解答这类题时,一般可通过巧思妙解得到答案,下面介绍几种方法。一、分总法一般先分别将所给项目两两排队,然后归总,找出正确顺序,此法最为常用。例1有A、B、D、E四种金属,当A、B组成原电池时,电子流动方向为A→B;当A、D
Sequential multiple-choice questions are a relatively common type of questions, such as the order of chemical quantities, the order of speed, the sequence of experimental operations, and the sequence of activities. When answering such questions, you can usually get answers through ingenious solutions. Here are some methods. First, the sub-general law generally first separates the two or two lines of the given project, then returns the total and finds out the correct sequence. This method is most commonly used. Example 1 has four metals A, B, D, and E. When A and B form a primary battery, the electron flow direction is A→B; when A, D,