先看一个案例:例1 如图1所示是小红利用小瓶、橡皮塞和玻璃管自制的液体温度计.该温度计是根据液体____的规律来工作的.实际使用中发现该温度计玻璃管中液柱变化不明显,导致示数不准确.对此请你提出一条改进的建议:______.(2005年无锡市中考试题)这个素材来源于课本(人教版八年级《物理》上册第四章第一节),可能很多老师第一眼看到此题的反应是回忆:“我有没有讲过”.“讲过”就一定比“没讲过”效果好?教过几年书的老师都清楚,讲过的问题学生不一 First look at a case: Example 1 is a small red vial, rubber stopper and glass tube made of liquid thermometer as shown in Figure 1. The thermometer is based on the law of the liquid ____ to work in practice found that the thermometer glass tube In the liquid column change is not obvious, leading to show the number of inaccuracies.To this you please make an improvement suggestion: _ _ _ _ _ _. (2005 in Wuxi City Examination questions) This material comes from the textbook (PEP eighth grade “Physics” Volume fourth Chapter first section), may be the first time many teachers to see the reaction of this question is to recall: “” said “than ” never said "effect is good? Teachers who have taught books for several years are all well aware of the problems students have been exposed to