英语周报九上2020年一2021年第12期答案

H2A【解析】BH的电子式为[H:,A项正确;HNaH为离子化合物,B项错误;BCl3中B原子不满足最外层8电子稳定结构,C项错误;NaCl中阴离子比阳离子多一个电子层,D项错误

第二节书面表达One possible versionHow to prevent online gaming addictionWith the popularity of mobile phones, more and moreteenagers are addicted to the Internet games, which doesgreat harm to their health and studies. Spending too muchtime in the virtual world, addicts will become cold and distant. What's worse, if exposed to violent games, playerstend to be more aggressive than usualTo prevent the addiction, we should often remind our-selves of these bad effects. Besides, we can do more out-door activities, which will keep our attention off the Internetgames. If hooked on online games, gradually reduce theamount of time spent on the games until we finally get rid ofthe addiction. We can also ask for help from our relativesteachers or friends

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