2022海外名校在线学术项目答案

2022海外名校在线学术项目答案，目前我们已经整理了2022海外名校在线学术项目答案的各科答案和试卷，更多智慧上进请关注本网站。

【参考范文】She wanted to get more help.Larrella took pictures of the library and uploaded them online,calling on peo-ple to donate books to her library.Before long,hundreds of new and secondhand books poured in.Larrella,heruncle and cousin spent a whole week checking,classifying and arranging the books and putting them on theshelves.Tired as Larrella was,a smile lit up her face when she pictured the scene where children were buried inreading by the book-filled shelves.The big day finally came.With everything ready,the library opened at last.At first several childrenstepped in curiously,but obviously eager to read the books.Larrella encouraged them cheerfully.Some chosewhat they liked,while others hesitated.Realizing they had trouble reading,Larrella gathered them in a corner,teaching them from the very beginning.Soon more children joined in.Every night Larrella spared some time togive lessons so that more children could gain knowledge from the books.Larrella's efforts opened the wisdomdoor for them,which would surely make a great difference to their lives.

31.A【解析】根据题意可知,谷氨酸与NMDA受体结合会引起突触后神经元的兴奋,而且NMDA受体是种离子通道蛋白,因此,静息状态时突触后膜上的NMDA通道处于关闭状态,∧正确;谷氨酸与NMDA受体结合后会引起突触后神经元的兴奋,因此应该导致钠离子大量内流,B错误;谷氨酸作为神经递质,由突触前膜释放到突触间隙的方式是胞吐,;C错误;题意显示,氯胺酮可作用于NMDA受体,使中枢神经系统迅速产生运动和感觉阻滞,据此可推测静脉注射氯胺酮抑制了钠离子内流,导致无法产生动作电位,D错误