题目

如图是兴奋在神经元之间传递的示意图，关于此图的描述错误的是（ ） A . 神经递质是从①处释放的 B . 兴奋传递需要的能量主要来自④ C . 兴奋可以在①和③之间双向传递 D . 神经元之间的传递是单向的与图中的结构有关 答案：CDuring the summer of 2001, I started reading books in English, mostly stories. I would learn a lot of new　　　　　　   1.________ words from these books, but I had terribly problems　　　　　　  2.________ memorizing them. I had to look up to the same word　　　　　　  3.________ many times, for which was quite troublesome. I realized　　　　  4.________ I do need a way to remember all this vocabulary. It was　　　　  5. _______ a great achievement for myself. I started writing down　　　　　　 6. _____ words from books that I read. I would come back from　　　　  7. ______ school, and then sat for an hour and two. I wrote down　　　　  8. _____ new words and added it to my collection. By the end　　　　　　  9. _____ of last year, my collection has grown to 3 000 words.　　　　　　 10. _____