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第27届全国中学生物理竞赛预赛试卷中的压轴题(第18题)是一道很好的题目,题目本身以实际应用(超声波流量计)为情境,似乎难度很大,但考查的知识(运动的合成与分解)却非常基本,几乎所有考生都可以着手思考一番.第27届全国中学生物理竞赛预赛压轴题(第18题)如下:
The Finale of Questionnaire (eighteenth) in the 27th National High School Physics Contest Preliminaries is a very good topic. The subject itself seems to be very difficult to apply in practice (ultrasonic flowmeter), but the knowledge of examination Synthesis and decomposition) is very basic, almost all candidates can start thinking about it.The 27th National Junior Physics Competition pre-test (Title 18) are as follows: