近日,我市举行了高密市理化生实验操作考试。其中有一道题生物试题是:“观察哺乳动物心脏的结构”。教师与学生在观察时,心室很明显,学生对照教材中的“心脏的形态与结构示意图”显示的心室大约是心房体积的两倍,按理说,心房观察起来应该也很明显。事实却是学生很难观察到哺乳动物的心房。 Recently, the city held a Gaomi test operation of science and chemistry students. One of these questions is: “Observe the structure of a mammal’s heart.” When the teacher and the student are observing, the ventricle is very obvious. The “shape and structure diagram of the heart” in the student control textbook shows that the ventricle is about twice the volume of the atrium, and it stands to reason that the atrium observation should also be obvious. The fact is that it is hard for students to observe the mammalian atrium.