2023江西高三4月联考理综

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2023江西高三4月联考理综试卷答案，以下是该试卷的部分内容或者是答案亦或者啥也没有

15.参考答案B说明分析由材料并结合所学知识可知,雅尔塔体系为战后美苏合作的形成提供了历史机遇,但美苏双方由于意识形态和社会制度等的差异,互相猜疑,产生提防心理,致使美苏之间矛盾激化,进而引发对抗,故B项正确;大国之间的互相猜疑、不信任等才会加剧国际局势紧张,A项错误;根据所学知识可知,美苏两国在国家利益上的冲突导致美苏对抗,且“决定”表述过于绝对,C项错误;材料并未涉及东亚地区的政治变动,D项错误。

7.参考答案D说明分析根据表中数据可知,1912-1921年中国进口额一直大于出口额,处于入超地位,故A项错误;1917年俄国十月后社会主义才逐渐成为一大社会思潮,故B项错误;辛亥爆发于1911年,与表格时间不符,故C项错误;根据表中数据可知,1912-1921年中国出口额曲折缓慢增长,并且始终低于进口额,联系所学,此时的民族资本主义受到列强压制,发展艰难,故D项正确。

6A解析】根据图乙可得原线圈两端电压的有效值为U1=220V,根据公式=可得副线圈两端电压的有效值为110V,D项错误;因为二极管为理想二极管,所以二极管正向导通时的电流为r,110A55=2A,设电流表的示数为Ⅰ,则有PRT=R·,解得Ⅰ=2A,A项正确;电压表的示数为U=IR=552V,B项错误;灯泡L的功率为P=P2R=110W,C项错误。

14.【解析】(1)金属棒P1在区域ABCD的磁场中运动时产生的电动势为E=BLv(1分)代入数据解得E=0.6V(1分)回路中的感应电流为/≈E(1分)解得Ⅰ=1A(1分)由平衡条件得F1=2mosin0+BIL(1分)解得F1=1.3N(1分)(2)当金属棒P1、P2均在磁场中运动时,拉力F的功率最大拉力为F2=2mosin+4BIL(分)解得F2=2.2N(1分)拉力F的最大功率为P=F2v(1分)解得P=4.4W(1分)

第二节读后续写( One possible version)Finally, the day came. Anxious but excited, I spent the whole day cleaning the house andpreparing the food. With everything ready, all guests arrived one by one. within the next hourand a half, I had six complete strangers laughing, eating, and drinking at my apartment. Musicwas playing, the conversation was flowing, and new friendships were being formed. It wasincredible. One of the people, whom I messaged on Instagram, told me this was one of the mostfun New York City experiences he'd ever had. All enveloped in a curtain of darkness, it was timeto say goodbyeWhen everyone had left, I sat down and processed what had just happened. I couldn,'tbelieve that 48 hours before I didnt know any of these people, and now we were all laughing andtalking like we'd always been friends. It was a really enjoyable and unforgettable experience forme. It also made me realize that doing something kind for strangers isnt awkward butmeaningful. Whether it's paying it forward with a cup of coffee or simply smiling at a stranger,random acts of kindness do make the world a little better (173 words)