2018-2022学年英语周报。答案

书面表达One possible versionDear PeterI'm writing to invite you to see the Chinese Painting Exhibition to be held in our city.The exhibition will start at 8: 30 am on Saturday and last till 5: 00 pm on Sunday in the city museum It'ssaid that a large number of Chinese paintings, some of which are original works by famous painters like ZhangDaqian and Qi Baishi, will be on display. Besides, there will be various souvenirs to be sold. I know you re veryinterested in traditional Chinese culture, so I can t wait to tell you the news and hope we can go together.Looking forward to your reply.You

14A【解析】本题考查原子物理学知识,目的是考查学生的理解能力。汤姆孙首先发现了电子选项A正确饱和光电流大小取决于单位时间内通过导线横截面的电荷量只要入射光的强度和频率不变单位时间内逸出的光电子数就不变饱和电流就不变选项B错误在康普顿效应中当入射光子与晶体中的电子碰撞时光子把一部分动量转移给电子光子的动量减小能量减小频率减小故光子散射后的波长变长选项C错误;比结合能越大原子核越稳定选项D错误。

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