2022英语周报八年级深圳16期答案

【参考范文】One day, Spotty returned from his daily walk with a broken leg. Appearing exhausted, he came to myroom and sat near me, the leg bleeding. I called my mother and she quickly tied a bandage around his leg andgave him food to eat. I was very upset. But the next day, Spotty followed me wherever I went happily asusual though he limped a bit. After this incident my relation with Spotty became more intense. I reallyadmired him a lot for his courageAlmost a year later, one midnight we heard Spotty barking breathlessly. We rushed out and saw himbarking continuously, heading somewhere. After some time Spotty became quiet. I patted him on his backand came inside. The next morning, my heart skipped a beat when I didn't see Spotty. I searched for him ineach and every corner but in vain. And this time he had gone and would never come back. I cried and waitedfor him. But there were no signs of him and I only say him looking at me with his sparking eyes in my dream

1.(12分)(1)bd(2分)(2)d(2分)(3)CO2(2分)氨气分子为极性分子,易溶于极性溶剂水中;氨气分子与水分子间易形成氢键;氮气可与水反应(3分)(4)氢键范德华力(2分)非极性键(1分)【解析】(1)由结构简式知维生素B2中存在离子键、非极性共价键极性共价键,a项错误,bd项正确;与氯化钠晶体相比,维生素B1中阳离子半径比Na 半径大,维生素B1的晶格能小,熔点不可能高于NaClc项错误(2)维生素B1晶体溶于水的过程中会电离出C-等需克服离子键维生素B2分子间存在氢键、范德华力故选d项(3)N2为单质,另外五种化合物中属于非极性是CO2NH3极易溶于水,是因为NH和水均为性分子,NH3溶于水后,NH2与水分子间可形成氢键,NH1可与水反应(4)渡氨汽化破坏分子间作用力包括氢键和范德华力;氮气分解生成N2和H2,破坏氮氢极性键N2、H2生成氮原子和氢原子,破坏非极性键

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