2022-2023学生双语报17初一答案,目前学生双语报答案网已经整理了2022-2023学生双语报17初一答案的各科答案和试卷,更多学生双语报答案请关注本网站。
Li Hua第二节One possible version:haeday,1oitionadmygafinfromtofmteboardanddrafadaniaeleerocarhaosiogtsospuabeaieIesledoaownloWCaiosreaiedpeopleamdhowitrepreseatadtherenri。nprettood jtothir ca eaqure theirsheadquarters,and the CEOwho ran the whole business.AcofmnherIstopped by the phonre When I entered thetre there as a mile ongadyDebind the tounrouCrsand she aardoanymorewhy?"My heart skipped."Did anything happen?She replied,"Some woman wrote a letterCrs”5they promoted him and gave him his own store.Can you believe it?His own store!Luckyras.I tumned to walk out,feeling happy to have done something nice for som
4.【答案】C【命题意图】本题考查离子的跨膜运输方式,旨在考查理解能力。【解析】细胞中的无机盐包括K+和Na,大多数是以化合物的形式存在,A项错误:加大神经细胞外Na的浓度,动作电位的峰值会增大,但静息电位不受影响,静息电位的形成与细胞内K+的浓度有关,B项错误:Na进入神经细胞的运输方式是协助扩散,需要载体的协助,运出细胞属于主动运输,也需要载体的协助。K外流,属于协助扩散,流入神经细胞时,属于主动运输,同样需要膜上载体蛋白的协助,C项正确:神经细胞受刺激时,Na大量内流,同时阻止K+外流,产生动作电位,当静息电位恢复过程中,K+又继续外流,D项错误。