第一节Dear Mr GeorgeI am Li Hua, a volunteer of the activity"Englishi Communication to the Mountains". Now, I'm writing toexpress my sincere apology to you for not being present atthe activity to be held next Monday.The reason for my absence is that I suddenly fell illMy parents sent me to hospital, and I have to stay therefor a week. As for my volunteer work, I have asked myclassmate Tom to do it.Sincerely hoping that you can accept my apologiesYours.Li Hua

18.(除标注外,每空1分,共15分)I.(1)前者为离子晶体,后者为分子晶体(2)SCl为非极性分子,SbCb为极性分子(3)形成a键的氧原子只与1个S原子结合,O、S原子间电子云重叠程度较大(或形成b键的氧原子与2个S原子结合,O、S原子间电子云重叠程度较小)Ⅱ.(4)①核电荷数依次增大,原子半径逐渐变小,故获得一个电子释放的能量依次增大N原子的2p轨道为半充满稳定状态,故不易结合一个电子②X射线衍射ABCm(5)①sp2②氮原子上连H原子容易形成分子间(或离子间)氢键,使该离子不易以单个形式存在Ⅲl.(6)8XY(7)2x×100%2分)

以上就是英语周报2019__2022第35期答案，更多英语周报答案请关注本网站。

本文地址： http://www.ncneedu.cn/post/6680.html

文章来源：admin

版权声明：除非特别标注，否则均为本站原创文章，转载时请以链接形式注明文章出处。