题目内容

There was a time when Whitney didn't have a lot of friends. All through high school, she just slipped in and out of "light" friendships where she didn't find a lot of comfort or (1).When it was time for her to go to college, Whitney was nervous and (2) at the idea that she might have to go without friends. So, she was (3) to make a change.The first week of classes, something happened that (4) Whitney's life forever. In her English class, when asked to share their goals for the class, most of the students said their goal was to get a good grade, or pass the class. Whitney (5) something entirely different: Her goal was to make just one good friend.To her (6), while most of the students sat in silence, one student came to Whitney and held out his hand and introduced himself. He asked if she would be his friend. The whole room was silent – all eyes (7) on Whitney and the hand held out just in front of her. She smiled and (8) her hand out to take his and a friendship was formed. It was a friendship that lasted through college. It was a friendship from which a romance was (9). It was a friendship that brought two people together in marriage and (10) them through many good and bad times.

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在周围神经纤维包裹神经元轴突的是:

A. 神经外膜
B. 神经束膜
C. 神经内膜
D. 神经元的细胞膜
E. 神经膜细胞

电镜下尼氏体( Nissl body) 是由:

A. 许多粗面内质网和微管组成
B. 许多粗面内质网和溶酶体组成
C. 许多粗面内质网和线粒体组成
D. 许多粗面内质网和滑面内质网组成
E. 许多粗面内质网和游离核糖体组成

突触前膜是指:

A. 轴突末端细胞膜
B. 释放神经递质侧的细胞膜
C. 树突末端细胞膜
D. 有受体一侧的细胞膜
E. 胞体的细胞膜

神经元的轴突内没有哪项结构:

A. 神经丝
B. 线粒体
C. 微管
D. 滑面内质网
E. 尼氏体

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