选择题能考查同学们在学习活动中的记忆与理解、判断与推理、分析与比较、鉴别与评估等多种能力。要做好选择题,不仅应该具备扎实的物理知识,还要掌握解答选择题的基本方法。下面举例说明。一、直接判断法例1(2011年福建省福州市中考题)一块铁块的质量会发生变化的情况是()A.将它熔化成铁水B.磨掉铁块一个角C.把它轧成薄铁片D.从地球运到月球解析质量不会随物体的位置、形状、状态、温度而改变。铁块熔化成 Multiple choice questions can test students’ abilities of memory and understanding, judgment and reasoning, analysis and comparison, identification and evaluation in learning activities. To do multiple choice, not only should have a solid physical knowledge, but also master the basic answer to multiple-choice questions. Here’s an example. A direct judgment Law 1 (Fuzhou, Fujian Province in the 2011 test questions) a piece of iron will change the quality of the situation () A. Melt it into molten iron B. Abrade a corner of the iron C. Roll it into Thin iron sheet D. transported from the Earth to the moon resolution quality does not change with the object’s position, shape, state, temperature. Iron melts into