开封市2023届高三年级第二次模拟考试理综答案

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4.〈3分〉D【解析】“国家建设的最基础、最重要的支撑”扩大范围和程度,不合文意,原文为“社会倍用体系建设是粤港澳大湾区建设最基础的支撑5.〈3分)C【解析】“建立社会倍用体系,就可战胜拜金思潮的冲击”推断不成立6.(6分)①社会信用体系适应现代社会的发展,与时俱进,而传统信文化适合于农耕时代②社会信用体系以法律法规、完善的体制机制为约束,传统信文化只依靠自我修养和碑约束:③社会信用体系约束面更广,而传统信文化主要约束个人;④社会信用体系利大数据实现倍息共享,让信息更透明。(每点2分,任答对三点给6分,意思相近即可若有其他答案,言之成理即可

20.(6分)①要么价格高②随着居民收入水平提升③引导公众改变消费惯每点2分,共6分)

315解:易得圆O的半径r=3MP.M@=(MO+OP)(MO+O2)=(M0+OP)(MO-OP)=OM-OP=OM当M为正△ABC边的中点是OM最小为2,当M为正△ABC的顶点时OM最大为3233,故PMMQ的取值范围为[O

C

9解:由a为锐角,Sin(a-15)=知cos(a-15)=724cos(2a-30)=1-2sin(a-15)=co2a+15)=cos[(2a-30°)+450x、3s,sin(2a-300)=2si(a-15)cos(-125J=cos(2a-30)cos45-sin(2a-30)sin45√224√217√225225250

23.(1)大气中水汽充足;大气垂直温差大,形成强烈的上升气流;大气不稳定,且积雨云层中上部温度低至0~-20℃。(每点2分,任答2点得4分)(2)5月,中低纬升温快,冷暖空气频繁交汇,大气不稳定;川西髙原地形复杂,加剧大气的不稳定性;空气中水汽含量增大,白天地面增温快,对流旺盛;积雨云0℃层高度偏低,上升气流降温快,易凝固形成冰雹;近地面气温偏低,当冰雹形成后,在下降过程中不容易形成雨滴或消失。(每点2分,任答2点得4分)(3)内陆高原,水汽含量较少,难以聚集成较大冰粒;川西高原海拔高,近地面气温低,大气上升气流较弱,冰雹在生长区往返次数少。(4分(4)冰雹时间分布上具有突发性强、发展迅速、持续时间短的特点;空间分布上具有影响范围小、离散性强(大多数冰雹降落点呈点状分布)的特点;复杂地貌所产生的局地强对流天气可能触发冰雹,增加预报难度。(每点2分,任答2点得4分)【解析】本题以冰雹这种特殊的天气现象为例,考查冰雹形成的天气条件、局部地区冰雹天气形成的条件等。第(1)题,本题考査冰雹的形成条件,根据材料和图进行分析,形成冰雹要具备充足的水汽、强烈的对流天气及大气不稳定、降温迅速等。第(2)题,分析川西高原冰雹5月多发的原因,根据上题冰雹形成的条件从当地的气候(气温、降水)及地形等角度进行分析。5月中低纬升温快,冷暖空气频繁交汇,大气不稳定;该地空气中水汽含量增大,白天地面增温快,对流旺盛;川西高原地形复杂,加剧大气的不稳定性;积雨云0℃层高度偏低,上升气流降温快,易凝固形成冰雹;近地面气温偏低,当冰雹形成后,在下降过程中不容易形成雨滴或消失。第(3)题,冰雹大小受水汽多少和空气对流运动强弱的影响。一是由于川西高原地处内陆地区,水汽含量较少,难以聚集成较大冰粒;二是由于川西高原海拔高,近地面气温低,大气上升气流较弱,冰雹在生长区往返次数少。第(4)题,根据材料可知冰雹发生时间短、突发性强;空间上范围狭窄;而冰雹发生除特定的天气条件外还与地形的复杂程度有关等增加了冰雹天气预报难度。

One possible versionThen I wondered whether the man would still be at the same spot. I walked out the doorand back to the street where I had met him. There the man was, at the same spot, knees curledup against his chest, with the same cardboard sign shading his head. I walked down the street,and before I could think twice, I stood before him. He cautiously glanced in my direction.Ismiled and held up the lunch bag. "I brought you some lunch, "I saidI handed him the bag, and he looked closely at it. " Thank you for this. I was praying thismorning, asking for someone,s heart to open. We talked for a little while. As he shared hisstory, there was an, open, honest tone in his voice. There was something about giving thatmade me feel like I was talking with a brother. "I hope you have a nice day, "I told him<"Thank you! It's already gotten a lot better, " he said. As I walked by, his thank fulness hadbecome mind. My day, too, had already gotten a lot better. Anything helps, indeed