2021-2022 英语周报 八年级 GZ 7答案

第二节My dad tapped me gently on the shoulder, and we went inside. Sitting back to ourCornish chicken, Dad, smilingly, updated me on recent events at his work without a mere mentionof the crazy dough wildly dancing outside, which served wonderfully as a gentle embarrassmentreliever. However, while doing the dishes after dinner dad said to me with firmness in his voiceYou don' t have to be an expert to make bread, but you do have to do your research before takingactions. There is no such thing as an easy way out. And that was the starting point of my journeywith making the perfect breadAt a party three months later, everyone wanted to try my bread. The rest of the nightslipped away, filled with inquiries about my secret recipe. Yet, hardly was there a different answerother than, Beauty comes from balance and patience to be frank, that was exactly what I'dlearnt during my numerous experiments. An amazing loaf of bread required suitable balance ofingredients to mix as well as enormous patience of waiting for the dough to rise. Countless weremy failures to make tasty bread, every single moment of it was cherished. Along the journey, Ivedeveloped from the man whose dough sighs in a dustbin to the man whose bread makes your tastebut dance

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。

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