同学们,你步入八年级将近一年,已经学习了许多物理知识,相信你一定很棒!也许你已经感觉到物理学的无限乐趣,正享受物理学给你带来的快乐。物理学的确是一门有趣、有用的科学,但也要注意在学习物理及日常生活中应用物理都必须注意安全问题。例如,在生活中用电注意安全,谨防触电及发生火灾;在物理实验操作中也要注意安全问题,例如,用电器允许通过的最大电流或能够承受的最大电压,电流表、电压表的量程及滑动变阻器的规格等。 My classmates, you have entered the eighth grade for nearly a year. You have learned a lot of physics knowledge. I believe you must be awesome! Perhaps you have already felt the joy of physics and are enjoying the pleasure that physics brings to you. Physics is indeed an interesting and useful science, but it should also be noted that the application of physics in the study of physics and daily life must pay attention to safety issues. For example, in life, use electricity to pay attention to safety, beware of electric shock and fire; also pay attention to safety issues in physics experiment operation, for example, the maximum current that the electric appliance can pass or the maximum voltage that can withstand, the range of ammeter and voltmeter and Sliding rheostat specifications.