C
Imagine you are in a hard game of tug-of-war(拔河). You pull the rope hard to keep your team from losing. More people join your team. The team becomes stronger, but did you know that when more people join, each person actually tries less hard?
This is a common behaviour in humans, says Daniele Carlesso, a researcher in Germany. He wondered whether ants act the same way when they work together. Ants and humans have much in common. For example, ants are one of the few animals that often move things as a group to achieve a goal, just like people.
Carlesso's team studied weaver ants that live in tropical forests. They work well together, joining their bodies to do group tasks. They use leaves to make nests or carry big things. These ants can join together using their mouths or legs to build different shapes.
In the lab, scientists watched the ants work on a paper leaf. They measured(测量) how hard the ants pulled and carried the paper as a team. They thought each ant might work less when the group grew bigger—as people do. But they found the opposite was true. When more ants joined, each ant tried almost twice as hard. The ants became even better team workers.
The study was published(发表) in the magazine Current Biology. Carlesso says this finding may help engineers build better robot teams. It may also encourage people to be better team players.
People often think: “If I try less, no one will notice.” In a group, people sometimes feel less responsible.
As for Carlesso, when posting about the study online, he made sure to write, “huge thanks to my team for their great effort.”
()23. What happens in a tug-of-war team when more people join?
A. The team becomes weaker.
B. Everyone pulls much harder.
C. The game stops immediately.
D. Each one pulls with less strength.
()24. How did weaver ants react in the scientists' experiment?
A. Ants refused to join their bodies together.
B. Each ant worked less when the group grew.
C. Ants could not work together on a paper leaf.
D. Each ant worked harder when more ants joined.
()25. What does the underlined word “responsible” mean in Paragraph 6?
A. Feel they're the leader.
B. Feel they need to do their part.
C. Feel tired and want to rest.
D. Feel happy to be with a friend.
()26. What is the main purpose of this passage?
A. To introduce a type of weaver ant.
B. To explain how to play tug-of-war better.
C. To ask people to build more robot teams.
D. To show how ants can teach us about teamwork.

23. D 24. D 25. B 26. D

【分析】
1. 第23题：题干询问拔河队伍加入更多人后的变化，先定位到文章第一段，找到关键句“when more people join, each person actually tries less hard?”，对比选项即可得出答案。
2. 第24题：题干询问织叶蚁在实验中的反应，定位到文章第四段实验结果部分，关键句为“When more ants joined, each ant tried almost twice as hard”，据此匹配选项。
3. 第25题：猜测划线词“responsible”的含义，结合第六段上下文“People often think: ‘If I try less, no one will notice.’”，可知此处指人们在群体中觉得不需要做好自己的分内事，由此推断词义。
4. 第26题：主旨大意题，梳理文章结构：先以人类拔河的团队现象引入，接着介绍科学家对蚂蚁团队合作的研究，最后说明研究发现对人类的启示，总结得出文章主旨是展示蚂蚁能教我们关于团队合作的道理。
【解析】
23. 细节理解题。根据第一段最后一句“when more people join, each person actually tries less hard?”可知，当更多人加入拔河队伍时，每个人用的力气更小，对应选项D。
24. 细节理解题。根据第四段“But they found the opposite was true. When more ants joined, each ant tried almost twice as hard.”可知，在实验中，更多蚂蚁加入时，每只蚂蚁更努力了，对应选项D。
25. 词义猜测题。根据第六段“People often think: ‘If I try less, no one will notice.’”可知，人们在群体中觉得自己偷懒不会被发现，也就是觉得不需要承担做好自己部分的责任，“responsible”意为“有责任感的，觉得需要做好自己分内事的”，对应选项B。
26. 主旨大意题。文章先介绍人类团队中存在的“偷懒”现象，再通过科学家对织叶蚁的研究发现蚂蚁团队合作时反而更努力，最后说明该发现对人类团队合作的启示，因此文章主要目的是展示蚂蚁能教我们关于团队合作的道理，对应选项D。
【答案】
23. D 24. D 25. B 26. D
【知识点】
1. 细节理解
2. 词义猜测
3. 主旨大意
【点评】
本文通过人类拔河的现象引入，对比介绍了织叶蚁团队合作的实验结果，揭示了蚂蚁与人类在团队合作中的不同表现，并点明研究发现对人类的启示。题目涵盖了阅读理解常见题型，考查学生定位信息、推断词义及总结主旨的能力，有助于提升学生阅读理解综合素养。
【难度系数】
0.6