题目

下列有关氢氧化铁胶体说法正确的是 A．将外加直流电源通过该胶体，阴极处颜色变深，则说明该胶体带正电荷 B．鉴别FeCl3溶液和Fe(OH)3胶体，可用利用丁达尔效应 C．采用过滤，可将Fe(OH)3胶体中的FeCl3杂质除去 D．向Fe(OH)3胶体中加入大量盐酸，则最终可引起胶体聚沉 答案：B One day Madison’s teacher found her sitting alone at lunch, looking sad and upset She didn’t go to get her favorite sandwich that she usually couldn’t wait to eat. “What’s the matter, Madison?” the teacher asked.Later that afternoon, Trey was standing alone by the sports ground after school. Trey’s mom asked him why he didn’t go to play with Zack and Steve, who were playing basketball. He told his mom he just didn’t want to play, so they walked home.But the fact was，Trey and Madison had the same problem： They both felt left out，and their feelings were hurt.Madison was so sad that she didn’t want to eat， and Trey was so sad that when he got home he closed his bedroom door.1. Who played basketball that afternoon?A. Zack and Steve.B. Madison and Steve.C. Trey and Madison.D. Madison and Zack.2. What does the underlined part “left out” mean in Chinese?A.被追捧B.被忽视C.被淘汰D.被呵护3. What is Madison’s problem?A. She was worrying about her homework.B. She felt too hungry.C. She felt left out.D. She was angry with her mom.4. What do you think the writer is going to talk about?A. What Madison’s mother would do.B. What makes kids feel left out.C. How to make friends.D. Other problems today’s kids have.