2023全国100所名校单元测试示范卷第十九套英语答案
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全国100所名校英语卷3答案解析
21.(共11分，除标注外，每空1分)(1)增加气孔导度和胞间C02浓度、提高净光合速率(2分)明显CK组第30天净光合速率显著下降氨素的形态NO(或硝态氮)(2)T3组培养液中硝态氮(NO?)的含量低于T1组，且NH4的竞争作用会降低烟草对NO的吸收(2分)(3)ATP和NADPHCK组的Fm>T3组的Fm>T1组的Fm(2分)【命题意图】本题主要考查光合作用的物质变化、影响光合作用的因素等知识点，意在考查考生的信息获取能力、分析能力和综合运用能力。【解析】(1)实验测量的指标有气孔导度、胞间C02浓度和净光合速率，将T1、T2、T3与CK比较，氮素增加了气孔导度和胞间C02浓度，提高了烟草的净光合速率，由题干及题表可知，CK组第30天净光合速率显著下降，说明缺氮氯效应明显。将T1、T2组与CK组比较，T2组在15天时气孔导度、胞间C02浓度、净光合速率均没有明显变化，说明铵态氮(NH)对烟草光合作用的影响较缓慢，即氨素的形态影响光合作用，硝态氨(NO;)更有利于促进烟草吸收C02。(2)T1组只含硝态氮(NO;)营养液，T3组中硝态氮与铵态氮比例为1：1(NO3:NH=1:1),实验条件均保持适宜，两者培养液的体积相同，T3组培养液中硝态氮(NO)的含量低于T1组；另外，培养液中NH4的竞争作用会降低烟草对NO?的吸收，所以T3组的净光合速率小于T1组。(3)光反应产生ATP和NADPH用于碳还原。光能被吸收后转化为ATP和NADPH中的能量、热能和发射荧光的能量，三者之间存在竞争关系。若硝态氮(NO)有利于叶绿素分子传递和转换能量，从而用于光反应，则T1组的硝态氨(NO)含量最多，光反应产生能量最多，发射的荧光最少；CK组的硝态氮(NO)含量最少，光反应产生能量最少，发射的荧光最多。检测CK、T1和T3组光合色素吸收光量子后释放的最大荧光参数Fm时，CK组的Fm>T3组，T3组的Fm>T1组。
全国100所名校最新模拟示范卷理综
第二节One possible version:Thankfully,the police were able to track her down justbefore she left the airport.Officer Tony Garza gifted Mrs.Ann a $50 gift card."Obviously,this does not even coverAnn's expenses,"Tony said."But it does give us anopportunity to tell you about Ann and others who alwaysshow everyday kindness.Then it was finally time for herto go home right after she tried giving the gift card away,ofcourse.Since Mrs.Ann's story has spread quickly on theInternet,countless people have been praising her for herkindness.However,Mrs.Ann didn't think John got enough at-tention.So she called the officers,who got in contact withJohn,the other hero in this story and also gifted him a $50gift card to praise his selflessness.John's schedule waspacked the day when Mrs.Ann asked for his help.Histo-do list was a mile long,and he needed to pick up hisbrother Austin from his first day at a new job.He didn'thave time to make a 49-mile trip to Florida,but he stoppedimmediately to help the strangers.
