2021智慧上进初三答案

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17.A【解析】CO2在细胞外的浓度低于细胞内,与图甲中b过程不符,A错误;根据图甲可知,a是细胞通过主动运输吸收物质,b是细胞通过自由扩散吸收物质,c是细胞通过主动运输排出物质,B正确;由于胰岛素只存在于细胞外,图乙所示细胞不一定是胰岛B细胞,C正确;Na+在细胞外的浓度高于细胞内,K+在细胞外的浓度低于细胞内,故图乙中能通过图甲中c过程来维持细胞内外浓度差异的物质是Na+,D正确

文章来源:hps:/language.chinadaily.com.cn/a20201108ws517309a31024ad0b8365hm该文主要介绍了各国独特的送礼习俗,==m21.B考查词交猜测。根据第五段 Therefore, whether you' re sending money as a gift ot justleaving a tip, place your money in an envelope to ensure it's received in a respectful man可知 distasteful"与 unpleasant”接近。22C考查细节理解。根据第四段 Despite the kind gesture., thank you cards and notesnot a common part of the gifting custom in Israel. "M"Despite the kind gesture, thankyou cards and notes are not a common part of the gifting custom in Israel"可知:以色列人几乎不送礼或收礼。ne v al ene23.D细节理解题。根据最后一段“Also, gestures of thanks are preferred over verbalreciprocation(E i). These may include jumping up and down, dancing, or whistling可知津巴布韦的人更喜欢用身体语言来表达谢意