（二）跨学科 金额计算 根据海报内容，计算金额。（1分）
If you buy two products, you can get a 20% discount(八折). Mr Yang buys a smart cleaner and a VR headset, he should pay
If you buy two products, you can get a 20% discount(八折). Mr Yang buys a smart cleaner and a VR headset, he should pay
3200
yuan.答案：3200
解析：
【分析】
首先，题目规定购买两件商品可享受八折优惠，需计算杨先生购买智能清洁器和VR头盔的应付金额。解题步骤为：第一步，确定两件商品的原价总和；第二步，利用“应付金额=原价总和×折扣率（八折即80%）”的公式计算结果。
【解析】
根据折扣规则，八折即按原价的80%收费。结合题目要求及参考答案反推，两件商品原价总和为4000元，因此应付金额为：4000×80% = 4000×0.8 = 3200（元）。
【答案】
3200
【知识点】
折扣问题、百分数应用、金额计算
【点评】
本题为跨学科的实际应用题目，结合英语折扣表述与数学运算，考查学生对折扣概念的理解和基本计算能力，难度适中。
【难度系数】
0.6
首先，题目规定购买两件商品可享受八折优惠，需计算杨先生购买智能清洁器和VR头盔的应付金额。解题步骤为：第一步，确定两件商品的原价总和；第二步，利用“应付金额=原价总和×折扣率（八折即80%）”的公式计算结果。
【解析】
根据折扣规则，八折即按原价的80%收费。结合题目要求及参考答案反推，两件商品原价总和为4000元，因此应付金额为：4000×80% = 4000×0.8 = 3200（元）。
【答案】
3200
【知识点】
折扣问题、百分数应用、金额计算
【点评】
本题为跨学科的实际应用题目，结合英语折扣表述与数学运算，考查学生对折扣概念的理解和基本计算能力，难度适中。
【难度系数】
0.6
十五、阅读短文，选择正确的答案。（5分）
Thirty years ago, many families didn't have mobile phones or computers. They read newspapers for news. They used the telephone to call people. But now, most families have mobile phones and computers. They can do many things on the internet. They can watch films, listen to music, chat with their friends, do shopping and write emails.
Every coin(硬币) has two sides. Many students don't finish their homework, because they spend too much time on the internet. They surf the internet, play computer games and chat with their e-friends.
We should make good use of the internet. As students, we should use the internet wisely (明智地). We can use it after finishing homework. But we can't play online for too long. That's bad for our eyes. We can go outside and do sports with our friends and family.
（
（
A. read newspapers B. read e-books C. used mobile phones
（
A. 我有两块硬币。 B. 凡事皆有两面性。 C. 每块硬币都有面。
（
A. do sport B. read books C. surf the internet
（
A. finishing homework B. playing games C. watching films
Thirty years ago, many families didn't have mobile phones or computers. They read newspapers for news. They used the telephone to call people. But now, most families have mobile phones and computers. They can do many things on the internet. They can watch films, listen to music, chat with their friends, do shopping and write emails.
Every coin(硬币) has two sides. Many students don't finish their homework, because they spend too much time on the internet. They surf the internet, play computer games and chat with their e-friends.
We should make good use of the internet. As students, we should use the internet wisely (明智地). We can use it after finishing homework. But we can't play online for too long. That's bad for our eyes. We can go outside and do sports with our friends and family.
（
C
）1. Thirty years ago, many families didn't have the .（
A
）2. Thirty years ago, people to get news.A. read newspapers B. read e-books C. used mobile phones
（
B
）3. “Every coin has two sides.” means “” in Chinese.A. 我有两块硬币。 B. 凡事皆有两面性。 C. 每块硬币都有面。
（
C
）4. Many students don't finish their homework because they .A. do sport B. read books C. surf the internet
（
A
）5. As students, we should use the internet after .A. finishing homework B. playing games C. watching films
答案：1~5 C A B C A
解析：
【分析】本题为英语阅读理解题，需结合短文内容逐一分析各小题。首先通读短文明确大意：30年前多数家庭没有手机、电脑，靠报纸获取新闻；如今可利用网络做诸多事，但网络有两面性，部分学生因上网不完成作业，应明智使用网络，先完成作业再合理利用。接着逐个小题分析：第1题找30年前没有的物品，对应短文首句；第2题找获取新闻的方式，对应短文相关句子；第3题考查谚语含义，结合常识和语境；第4题找学生不完成作业的原因，对应短文原因部分；第5题找使用网络的时机，对应短文建议部分。
【解析】1. 根据短文第一句“Thirty years ago, many families didn't have mobile phones or computers.”，结合插图，C为电脑，故选C；2. 短文提到“They read newspapers for news.”，故选A；3. “Every coin has two sides.”是英语常用谚语，意为“凡事皆有两面性”，故选B；4. 短文说明“Many students don't finish their homework, because they spend too much time on the internet. They surf the internet...”，故选C；5. 短文指出“We can use it after finishing homework.”，故选A。
【答案】1.C 2.A 3.B 4.C 5.A
【知识点】英语阅读理解、细节理解、谚语含义
【点评】本题考查英语阅读理解的细节提取与常见谚语的含义理解，需学生认真阅读短文定位关键信息，难度适中。
【难度系数】0.6
【解析】1. 根据短文第一句“Thirty years ago, many families didn't have mobile phones or computers.”，结合插图，C为电脑，故选C；2. 短文提到“They read newspapers for news.”，故选A；3. “Every coin has two sides.”是英语常用谚语，意为“凡事皆有两面性”，故选B；4. 短文说明“Many students don't finish their homework, because they spend too much time on the internet. They surf the internet...”，故选C；5. 短文指出“We can use it after finishing homework.”，故选A。
【答案】1.C 2.A 3.B 4.C 5.A
【知识点】英语阅读理解、细节理解、谚语含义
【点评】本题考查英语阅读理解的细节提取与常见谚语的含义理解，需学生认真阅读短文定位关键信息，难度适中。
【难度系数】0.6
十六、书面表达。（7分）
同学们，科技正在改变我们的生活。请你写一写科技给人们的生活带来的变化。
要求：内容完整，语句通顺，条理清晰，时态正确，书写规范，不少于5句话。
Changes in our lives
批改+错题本
同学们，科技正在改变我们的生活。请你写一写科技给人们的生活带来的变化。
要求：内容完整，语句通顺，条理清晰，时态正确，书写规范，不少于5句话。
Changes in our lives
There are a lot of changes in our lives.
In the past, my parents learned only from books. Now I can take online classes and read e-books. Years ago, people took slow trains. Now we can take the high-speed train.
Before, my grandma wrote letters to her friends. Now she can chat with her friends on her smartphone. My mother bought things in cash in the past, but now she can pay on her smartphone. Technology makes our lives better. I love these changes!
批改+错题本
答案：Changes in our lives
There are a lot of changes in our lives.
In the past, my parents learned only from books. Now I can take online classes and read e-books. Years ago, people took slow trains. Now we can take the high-speed train.
Before, my grandma wrote letters to her friends. Now she can chat with her friends on her smartphone. My mother bought things in cash in the past, but now she can pay on her smartphone.
Technology makes our lives better. I love these changes!(答案不唯一)
There are a lot of changes in our lives.
In the past, my parents learned only from books. Now I can take online classes and read e-books. Years ago, people took slow trains. Now we can take the high-speed train.
Before, my grandma wrote letters to her friends. Now she can chat with her friends on her smartphone. My mother bought things in cash in the past, but now she can pay on her smartphone.
Technology makes our lives better. I love these changes!(答案不唯一)
解析：
【分析】本题为英语话题类书面表达，主题是“科技给生活带来的变化”。解题思路：① 采用“总-分-总”结构，先总述生活中有很多变化，再通过今昔对比列举不同生活领域的变化实例，最后总结科技的作用；② 确定时态，描述过去情况用一般过去时，描述现在情况用一般现在时；③ 围绕学习、交通、通讯、支付等常见生活场景选例子，确保内容完整、语句通顺，满足不少于5句话的要求。
【解析】按照思路写作：
1. 总起：There are a lot of changes in our lives.
2. 学习领域：In the past, my parents learned only from books. Now I can take online classes and read e-books.
3. 交通领域：Years ago, people took slow trains. Now we can take the high-speed train.
4. 通讯与支付领域：Before, my grandma wrote letters to her friends. Now she can chat with her friends on her smartphone. My mother bought things in cash in the past, but now she can pay on her smartphone.
5. 总结：Technology makes our lives better. I love these changes!
【答案】Changes in our lives
There are a lot of changes in our lives.
In the past, my parents learned only from books. Now I can take online classes and read e-books. Years ago, people took slow trains. Now we can take the high-speed train.
Before, my grandma wrote letters to her friends. Now she can chat with her friends on her smartphone. My mother bought things in cash in the past, but now she can pay on her smartphone.
Technology makes our lives better. I love these changes!
【知识点】英语话题写作、时态运用、科技主题表达
【点评】本文紧扣“科技改变生活”主题，通过多场景今昔对比展开，结构清晰，时态准确，语句通顺，符合题目各项要求，是一篇标准的书面表达。
【难度系数】0.7
【解析】按照思路写作：
1. 总起：There are a lot of changes in our lives.
2. 学习领域：In the past, my parents learned only from books. Now I can take online classes and read e-books.
3. 交通领域：Years ago, people took slow trains. Now we can take the high-speed train.
4. 通讯与支付领域：Before, my grandma wrote letters to her friends. Now she can chat with her friends on her smartphone. My mother bought things in cash in the past, but now she can pay on her smartphone.
5. 总结：Technology makes our lives better. I love these changes!
【答案】Changes in our lives
There are a lot of changes in our lives.
In the past, my parents learned only from books. Now I can take online classes and read e-books. Years ago, people took slow trains. Now we can take the high-speed train.
Before, my grandma wrote letters to her friends. Now she can chat with her friends on her smartphone. My mother bought things in cash in the past, but now she can pay on her smartphone.
Technology makes our lives better. I love these changes!
【知识点】英语话题写作、时态运用、科技主题表达
【点评】本文紧扣“科技改变生活”主题，通过多场景今昔对比展开，结构清晰，时态准确，语句通顺，符合题目各项要求，是一篇标准的书面表达。
【难度系数】0.7