2023山东省济宁市高一下学期期末考试英语答案

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10.B【关键能力】本题考查的关键能力侧重于分析与推测、归纳与论证能力信息转换》W的某种单质被称为地球的保护伞,该单质为O,W为O,由该高能盐的结构可知,1个Y形成4个共价键且Y的原子序数比W的小,则Y为C,ZW3中Z为+5价,由该盐的结构知,1个乙形成3个共价键且Z的原子序数比W的小,则Z为N,1个X形成个共价键且原子序数最小,则X为H,X、Y、Z、W分别是H、C、NO【解题思路】H、C、N、O的周期序数之和为7,A项正确;原子半径C>N>O>H,B项错误;简单氢化物的稳定性:H20>CH4,C项正确;HlC、N可形成化合物NHCN,NH4CN是离子化合物,D项正确

写作Ladies and gentlemenTo begin with, please allow me to express my warm welcome on behalf of ourschool.【要点一,表达欢迎】 Aiming to enhance our mutual understanding andexperience different cultures, various activities wil! be arranged【高分句型现在分词作状语】. As planned, we will hold a talent show where everyone canshow their outstanding performances【高分句型二, where引导定语从句】Classes on traditional Chinese culture are also scheduled, such as paper-cutting,Chinese opera, calligraphy,etc, followed by a gifts exchangingactivity. Additionally, you're invited to pay a visit to surrounding scenicspots.【要点二,介绍活动安排】Finally, I sincerely hope that you can enjoy yourself and wish you a pleasantjourney.【要点三,表达愿望】