（一）对基本概念的比较Chemistry的基本概念：过去听说美国理科不重视概念教学，看来属误传。从教材的整个展开情况看，他们非常重视基本概念的教学，而且用很大的篇幅对概念的形成、意义和运用进行表述。不重视概念教学的印象也许来自于他们没有“单质”这个概念，曾经多次听 (A) Comparison of basic concepts Chemistry’s basic concept: In the past, I heard that American science did not attach importance to the concept of teaching, and it seems to be a misrepresentation. From the perspective of the overall development of the teaching materials, they attach great importance to the teaching of basic concepts, and use a lot of space to express the concept of the formation, meaning and use. The impression of not paying attention to the concept of teaching may come from the fact that they do not have the concept of “singularity” and have listened to it many times.