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四、七选五
Do you spend hours sitting at your desk every day? 1 A new study says this habit could raise your risk of heart problems, and even exercising in your free time won't fix it completely.
Sitting for long periods is already known to be bad for your health. Researchers in the US studied nearly 90,000 people to find out how sitting and heart health are connected. 2 They compared how much time people spent sitting with their heart health over several years.
The results were clear. 3 People who sat for more than 10.6 hours a day were 40% more likely to have a heart failure. Even people who exercised regularly faced a higher risk if they sat too much.
4 The authors of the study have some simple advice. First, try not to sit for more than 10.6 hours each day. Second, break up your sitting time with small movements. For example, you can walk during meetings, or stand up and move every 30 minutes.
5 No matter how busy you are, adding more movement to your day will help keep your heart healthy and strong.
A. Sitting too much harms your heart.
B. So what can we do to stay healthy?
C. It can cause serious health problems.
D. This is a common problem for students.
E. Sitting for long hours is a habit hard to break.
F. Even short breaks to move can make a big difference.
G. They wanted to find a link between sitting and health.
Do you spend hours sitting at your desk every day? 1 A new study says this habit could raise your risk of heart problems, and even exercising in your free time won't fix it completely.
Sitting for long periods is already known to be bad for your health. Researchers in the US studied nearly 90,000 people to find out how sitting and heart health are connected. 2 They compared how much time people spent sitting with their heart health over several years.
The results were clear. 3 People who sat for more than 10.6 hours a day were 40% more likely to have a heart failure. Even people who exercised regularly faced a higher risk if they sat too much.
4 The authors of the study have some simple advice. First, try not to sit for more than 10.6 hours each day. Second, break up your sitting time with small movements. For example, you can walk during meetings, or stand up and move every 30 minutes.
5 No matter how busy you are, adding more movement to your day will help keep your heart healthy and strong.
A. Sitting too much harms your heart.
B. So what can we do to stay healthy?
C. It can cause serious health problems.
D. This is a common problem for students.
E. Sitting for long hours is a habit hard to break.
F. Even short breaks to move can make a big difference.
G. They wanted to find a link between sitting and health.
答案
1. D
2. G
3. A
4. B
5. F
2. G
3. A
4. B
5. F
解析
【解析】
1. 空1前句提问“你每天要花好几个小时坐在书桌前吗？”，后句引出久坐提升心脏问题风险的研究，D选项“这对学生来说是个常见问题”承接前文的久坐场景，逻辑通顺。
2. 空2前句介绍美国研究者调研近9万人探究久坐和心脏健康的关联，后句说明他们多年对比人们的久坐时长和心脏健康状况，G选项“他们想要找到久坐和健康之间的联系”承接研究者的调研目的，前后呼应。
3. 空3前句点明研究结果清晰，后句说明每日久坐超10.6小时的人群心衰风险高40%，A选项“久坐过多会伤害你的心脏”总领本段的研究结论，贴合内容。
4. 空4后句直接引出研究作者给出的保持健康的相关建议，B选项“那么我们能做些什么来保持健康呢？”以设问自然过渡到下文的建议部分。
5. 空5前句举例说明每30分钟起身活动等碎片化运动的做法，后句强调无论多忙多活动都能保护心脏，F选项“哪怕是用来活动的短暂休息也能带来很大的作用”承接前文的短时间活动建议，呼应后文的健康意义。
【答案】
1. D
2. G
3. A
4. B
5. F
【知识点】
七选五阅读
语篇逻辑衔接
主题语境理解
【点评】
本题围绕久坐与心脏健康的科普主题设空，重点考查学生通过上下文指代、句间逻辑关系匹配补全语篇的能力，选项区分度适中，要求学生能梳理科普类说明文的行文脉络，抓住前后句的呼应信息选出合适答案。
【难度系数】
0.7
1. 空1前句提问“你每天要花好几个小时坐在书桌前吗？”，后句引出久坐提升心脏问题风险的研究，D选项“这对学生来说是个常见问题”承接前文的久坐场景，逻辑通顺。
2. 空2前句介绍美国研究者调研近9万人探究久坐和心脏健康的关联，后句说明他们多年对比人们的久坐时长和心脏健康状况，G选项“他们想要找到久坐和健康之间的联系”承接研究者的调研目的，前后呼应。
3. 空3前句点明研究结果清晰，后句说明每日久坐超10.6小时的人群心衰风险高40%，A选项“久坐过多会伤害你的心脏”总领本段的研究结论，贴合内容。
4. 空4后句直接引出研究作者给出的保持健康的相关建议，B选项“那么我们能做些什么来保持健康呢？”以设问自然过渡到下文的建议部分。
5. 空5前句举例说明每30分钟起身活动等碎片化运动的做法，后句强调无论多忙多活动都能保护心脏，F选项“哪怕是用来活动的短暂休息也能带来很大的作用”承接前文的短时间活动建议，呼应后文的健康意义。
【答案】
1. D
2. G
3. A
4. B
5. F
【知识点】
七选五阅读
语篇逻辑衔接
主题语境理解
【点评】
本题围绕久坐与心脏健康的科普主题设空，重点考查学生通过上下文指代、句间逻辑关系匹配补全语篇的能力，选项区分度适中，要求学生能梳理科普类说明文的行文脉络，抓住前后句的呼应信息选出合适答案。
【难度系数】
0.7
