2019至2022年。七年级牛津英语周报。答案

29.C【解析】根据题意分析,阿托品阻止了兴奋在突触处的传递,而滴加乙酰胆碱酯酶抑制剂后,乙酰胆碱在突触间隙中的浓度增高,阿托品的麻醉作用降低甚至解除,说明阿托品没有破坏突触的结构,也没有阻止突触前膜释放神经递质或阻断突触后膜上钠离子通道,因此很可能是因为竞争性地和乙酰胆碱的受体结合,导致乙酰胆碱不能和受体结合,进而影响了兴奋在突触处的传递,C正确

书面表达:命题立意:本题要求以你最难忘的一次旅行为题,写一篇英文短文,内容包括:1.旅行简述;2.难忘的原因设题有利于考查考生的英语核心素养,与中学生的生活密切相关。考生应该用英语思维合理表达,自然过渡到下一表达要点参考范文:My Most Memorable TripLast summer. I toured London with my parents. It was the most unforgettable trip for me. We visitedmany famous ancient buildings, like Big Ben and Tower Bridge. The visit to Cambridge University was reallyfantasticThe reason why the trip was the most unforgettable and impressive for me was that the city was clean andorderly and the British people were friendly and helpful. I found everyone obeyed the traffic rules. During theip. I tried every chance to communicate with the local people who were always eager to chat with me. In thatway. I knew much British culture and practiced my English as welL. So I'll always remember the precious trip toLondon.

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