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训练1 体裁：说明文 主题：科普知识 难度：★★★★ 建议用时：7 min 正确率：/5
Sometimes, when turning the pages of our textbooks, we get a paper cut. 1 Three scientists from the Technical University of Denmark found that 65-micrometre-thick paper is most likely to cut our skin(皮肤). They won the Physics Prize for this finding at the 2024 Pineapple of Science Award in Hangzhou, Zhejiang, on Nov. 23. 2 They used papers from 30 to 220 micrometres and tested them on man-made fingers made from ballistic gel. Made with animal protein, ballistic gel has the toughness of human skin. For thin paper, the scientists found it couldn’t cut the “fingers”—it just bent(弯曲). 3 When they tried the 65-micrometre-thick paper, the scientists found it cut the fingers the most, about once every five tries. The paper used for magazines such as Nature and Science is of a thickness(厚度) close to this. Common A4 printer paper is about 100 micrometres thick, which is much safer. 4 Pushing the paper straight down onto the fingers didn’t often result in a cut. Pushing the paper at a slanted angle(倾斜角度) resulted in more cuts. According to the scientists, their findings could lead to safer paper products. 5 It can cut through apples and chicken.
1. 2. 3. 4. 5.
Sometimes, when turning the pages of our textbooks, we get a paper cut. 1 Three scientists from the Technical University of Denmark found that 65-micrometre-thick paper is most likely to cut our skin(皮肤). They won the Physics Prize for this finding at the 2024 Pineapple of Science Award in Hangzhou, Zhejiang, on Nov. 23. 2 They used papers from 30 to 220 micrometres and tested them on man-made fingers made from ballistic gel. Made with animal protein, ballistic gel has the toughness of human skin. For thin paper, the scientists found it couldn’t cut the “fingers”—it just bent(弯曲). 3 When they tried the 65-micrometre-thick paper, the scientists found it cut the fingers the most, about once every five tries. The paper used for magazines such as Nature and Science is of a thickness(厚度) close to this. Common A4 printer paper is about 100 micrometres thick, which is much safer. 4 Pushing the paper straight down onto the fingers didn’t often result in a cut. Pushing the paper at a slanted angle(倾斜角度) resulted in more cuts. According to the scientists, their findings could lead to safer paper products. 5 It can cut through apples and chicken.
1. 2. 3. 4. 5.
答案
1. F 根据上文"Sometimes, when turning the pages of our textbooks, we get a paper cut."和下文"65-micrometre-thick paper is most likely to cut our skin"可知，纸张能割伤人，不同厚度的纸张割伤程度不同；F项"你知道有些纸张比其他纸张更‘危险’吗？"符合语境。故选F。
2. C 根据下文"They used papers from 30 to 220 micrometres and tested them on man-made fingers made from ballistic gel."可知，科学家用不同厚度的纸张进行实验。故选C。
3. G 根据上文"For thin paper, the scientists found it couldn't cut the ‘fingers’—it just bent."可知，此处进一步介绍上文关于纸张厚度的实验结果；G项"而对于较厚的纸张，在手指上留下了印记却破不了‘皮’。"符合语境。故选G。
4. B 根据下文"Pushing the paper straight down onto the fingers didn't often result in a cut. Pushing the paper at a slanted angle resulted in more cuts."可知，不同的切割角度会有不同的结果。故选B。
5. D 根据下文"It can cut through apples and chicken."可知，科学家运用这一发现进行新的创造；D项"他们还发明了一种便宜的裁纸刀——Papermachete。"符合语境。故选D。
2. C 根据下文"They used papers from 30 to 220 micrometres and tested them on man-made fingers made from ballistic gel."可知，科学家用不同厚度的纸张进行实验。故选C。
3. G 根据上文"For thin paper, the scientists found it couldn't cut the ‘fingers’—it just bent."可知，此处进一步介绍上文关于纸张厚度的实验结果；G项"而对于较厚的纸张，在手指上留下了印记却破不了‘皮’。"符合语境。故选G。
4. B 根据下文"Pushing the paper straight down onto the fingers didn't often result in a cut. Pushing the paper at a slanted angle resulted in more cuts."可知，不同的切割角度会有不同的结果。故选B。
5. D 根据下文"It can cut through apples and chicken."可知，科学家运用这一发现进行新的创造；D项"他们还发明了一种便宜的裁纸刀——Papermachete。"符合语境。故选D。
解析
【分析】
本题是科普类说明文的七选五题型，解题需结合上下文的语境、逻辑关系（如话题承接、对比说明等）匹配选项：第1空需承接“纸割伤皮肤”的话题，引出“纸张危险性”的内容；第2空需对应下文“用不同厚度纸张做实验”的描述；第3空需与上文“薄纸的实验结果”形成对比，对应厚纸的实验情况；第4空需引出下文“切割角度影响割伤”的话题；第5空需衔接下文“发明物品的用途”，对应科学家的发明成果。
【解析】
1. 选F：上文提到翻书时被纸割伤，下文引出“哪种纸最易割伤皮肤”的内容，F项“Did you know some papers are more ‘dangerous’ than others?”承接上下文，引出“纸张危险性”的话题，符合语境。
2. 选C：下文描述科学家用30到220微米的纸张做实验，C项“The scientists tested papers with different thicknesses.”说明实验对象，与下文实验内容衔接，符合语境。
3. 选G：上文介绍薄纸的实验结果（无法割伤“手指”，仅弯曲），G项“And for thicker paper, it left a mark on the fingers but couldn’t break the ‘skin’.”对应介绍厚纸的实验结果，与上文形成对比，符合语境。
4. 选B：下文说明“垂直推纸难割伤，倾斜推纸易割伤”，B项“The cutting angle also made a difference.”引出“切割角度”的话题，与下文内容衔接，符合语境。
5. 选D：下文提到“该物品能切苹果和鸡肉”，D项“They also created a cheap paper knife, the Papermachete.”说明科学家发明的产品，与下文用途衔接，符合语境。
【答案】
1. F 2. C 3. G 4. B 5. D
【知识点】
英语阅读理解；七选五题型；语篇逻辑衔接
【点评】
本题为科普类说明文的七选五题型，考查学生对语篇上下文逻辑关系的理解和信息匹配能力，话题贴近生活，解题关键是理清段落内的话题承接、对比等逻辑关系，难度适中。
【难度系数】
0.6
本题是科普类说明文的七选五题型，解题需结合上下文的语境、逻辑关系（如话题承接、对比说明等）匹配选项：第1空需承接“纸割伤皮肤”的话题，引出“纸张危险性”的内容；第2空需对应下文“用不同厚度纸张做实验”的描述；第3空需与上文“薄纸的实验结果”形成对比，对应厚纸的实验情况；第4空需引出下文“切割角度影响割伤”的话题；第5空需衔接下文“发明物品的用途”，对应科学家的发明成果。
【解析】
1. 选F：上文提到翻书时被纸割伤，下文引出“哪种纸最易割伤皮肤”的内容，F项“Did you know some papers are more ‘dangerous’ than others?”承接上下文，引出“纸张危险性”的话题，符合语境。
2. 选C：下文描述科学家用30到220微米的纸张做实验，C项“The scientists tested papers with different thicknesses.”说明实验对象，与下文实验内容衔接，符合语境。
3. 选G：上文介绍薄纸的实验结果（无法割伤“手指”，仅弯曲），G项“And for thicker paper, it left a mark on the fingers but couldn’t break the ‘skin’.”对应介绍厚纸的实验结果，与上文形成对比，符合语境。
4. 选B：下文说明“垂直推纸难割伤，倾斜推纸易割伤”，B项“The cutting angle also made a difference.”引出“切割角度”的话题，与下文内容衔接，符合语境。
5. 选D：下文提到“该物品能切苹果和鸡肉”，D项“They also created a cheap paper knife, the Papermachete.”说明科学家发明的产品，与下文用途衔接，符合语境。
【答案】
1. F 2. C 3. G 4. B 5. D
【知识点】
英语阅读理解；七选五题型；语篇逻辑衔接
【点评】
本题为科普类说明文的七选五题型，考查学生对语篇上下文逻辑关系的理解和信息匹配能力，话题贴近生活，解题关键是理清段落内的话题承接、对比等逻辑关系，难度适中。
【难度系数】
0.6
