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一、夯实基础,注重重点在基础教育中强调基础,永远是主旋律。就象造房子要打好地基一样,再强化也不会太过分。如解下面这道题,老师做起来觉得很容易,但历届学生的正确率并不高,这是为什么? 例18818O22-微粒中,含有( ) A.离子1mol B.中子20mol C.电子10mol D.电子9mol 答案:D 因为解题中不清楚一个818O22-中有几个中子、几个电子、式量为多少等基础知识,是做不好该题的,而老师对这些知识已非常熟悉,那自然就没什么障碍。又例:下列说法正确的是(№表示阿伏加德罗常数的值)( )
First, lay a solid foundation, pay attention to emphasize the basics in basic education, and always be the main theme. Just as building a house requires a good foundation, it will not be excessive. After solving the following question, the teacher feels it is easy to do it, but the correct rate of previous students is not high. Why is this? Example 18818O22-particles containing () A. ions 1mol B. neutron 20mol C. electron 10mol D.Electronic 9mol Answer:D Because it is not clear in the problem solving that a basic knowledge of a few neutrons, a few electrons, and the quantity of the 818O22- is not good enough for this question, and the teacher is very knowledgeable about this knowledge. Familiarity, there is no obstacle in nature. Another example: The following statement is correct (No indicates the value of Avogadro’s constant) ()