砺剑·2023相约高考 新高三培优卷(三)3生物试卷答案

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This story happened at last weekend.When I went to a grocery shop,I was shocking that a bottle ofshockedmilk cost 12 dollars while normally it costs around 5.The service was awful,either.I asked one of the workert00workersfor help,but chatting with his colleagues,he doesn't answer me at all.I had no choice but A help myself.When Ididn'ttotook a can of beans from a shelf,all the cans fell on him.I was so fortunately that I didn't get injured.The bossmefortunateand the worker apologized to me after that.Feeldisappointed about a grocery shop,I won't do shoppingFeelingthethere again.

20.C【解析】脊髓是脑与躯干、内脏之间的联系通道是调节运动的低级中枢，A正确；脑神经主要分布在头面部，负责管理头面部的感觉和运动，B正确；兴奋在神经纤维上的传导可以是双向的，C错误；树突短而粗，接受信息并将信息传导到细胞体，D正确。