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二、阅读理解
A 跨学科·化学
体裁: 应用文 主题: 化学实验 难度: ★★★★ 建议用时: 6 min 正确率: /3
What do you think will happen if you draw a picture with crayons and cover up that picture with paint? Now follow the steps below to find out the answer.
What you need
crayons of different colours * drawing paper * blue poster paint
a small bowl * a cup filled with water * a paintbrush
How to do it
Step 1: Think about a scene under the sea with different-coloured fish and sea plants. And then draw the fish and sea plants with your crayons. The more colours you use, the better your picture will be.
Step 2: Pour a little blue paint into the bowl. Add a bit of water and stir(搅拌) to make your paint a little thinner.
Step 3: Dip your brush into the blue paint in the bowl. Cover your whole picture with the blue paint. What happens? You have sea plants and animals living in a blue sea!
Why it happens
Your crayons are made of wax(蜡). Wax resists, or stays away from the paint. That's why it does not cover the picture. So your sea plants and fish are still there.
1. Which tool is needed for Step 1?
A. A paintbrush. B. A small bowl. C. Some blue paint. D. Different crayons.
2. 新趋势·图示理解 Which picture shows what you do in Step 2?
3. What does the underlined word "it" in the last part mean?
A. Paper. B. Water.
C. The bowl. D. The paint.
＞＞ 图示理解题解题策略见 P46 重点精讲
A 跨学科·化学
体裁: 应用文 主题: 化学实验 难度: ★★★★ 建议用时: 6 min 正确率: /3
What do you think will happen if you draw a picture with crayons and cover up that picture with paint? Now follow the steps below to find out the answer.
What you need
crayons of different colours * drawing paper * blue poster paint
a small bowl * a cup filled with water * a paintbrush
How to do it
Step 1: Think about a scene under the sea with different-coloured fish and sea plants. And then draw the fish and sea plants with your crayons. The more colours you use, the better your picture will be.
Step 2: Pour a little blue paint into the bowl. Add a bit of water and stir(搅拌) to make your paint a little thinner.
Step 3: Dip your brush into the blue paint in the bowl. Cover your whole picture with the blue paint. What happens? You have sea plants and animals living in a blue sea!
Why it happens
Your crayons are made of wax(蜡). Wax resists, or stays away from the paint. That's why it does not cover the picture. So your sea plants and fish are still there.
1. Which tool is needed for Step 1?
A. A paintbrush. B. A small bowl. C. Some blue paint. D. Different crayons.
2. 新趋势·图示理解 Which picture shows what you do in Step 2?
3. What does the underlined word "it" in the last part mean?
A. Paper. B. Water.
C. The bowl. D. The paint.
＞＞ 图示理解题解题策略见 P46 重点精讲
答案
A
【语篇解读】本文是一篇应用文。文章主要介绍了运用蜡笔与颜料分离(水油分离)原理的科学实验：用不同颜色的蜡笔画海底场景，再用稀释的蓝色颜料覆盖画面，蜡排斥颜料而无法覆盖蜡笔画，最终呈现“蓝色大海中的生物”效果。
1. D 细节理解题。根据“Step 1”中的“And then draw the fish and sea plants with your crayons.”可知需要用到不同颜色的蜡笔。故选 D。
2. C 图示理解题。根据“Step 2: Pour a little blue paint into the bowl. Add a bit of water and stir to make your paint a little thinner.”可知第二步是“将蓝色颜料和水倒入碗中并搅拌”。故选 C。
3. D 代词指代题。根据“Your crayons are made of wax. Wax resists, or stays away from the paint. That's why it does not cover the picture.”可知颜料因为被蜡排斥而无法覆盖蜡笔画的内容，此处“it”指代上文的“the paint”。故选 D。
【语篇解读】本文是一篇应用文。文章主要介绍了运用蜡笔与颜料分离(水油分离)原理的科学实验：用不同颜色的蜡笔画海底场景，再用稀释的蓝色颜料覆盖画面，蜡排斥颜料而无法覆盖蜡笔画，最终呈现“蓝色大海中的生物”效果。
1. D 细节理解题。根据“Step 1”中的“And then draw the fish and sea plants with your crayons.”可知需要用到不同颜色的蜡笔。故选 D。
2. C 图示理解题。根据“Step 2: Pour a little blue paint into the bowl. Add a bit of water and stir to make your paint a little thinner.”可知第二步是“将蓝色颜料和水倒入碗中并搅拌”。故选 C。
3. D 代词指代题。根据“Your crayons are made of wax. Wax resists, or stays away from the paint. That's why it does not cover the picture.”可知颜料因为被蜡排斥而无法覆盖蜡笔画的内容，此处“it”指代上文的“the paint”。故选 D。
解析
【分析】
本题为跨学科英语阅读理解题，包含细节理解、图示理解、代词指代三类题型。解题思路：先通读短文明确实验步骤与化学原理，再针对各小题定位原文对应信息：第1题查找Step1所需工具，第2题匹配Step2的操作内容，第3题结合代词所在句的上下文确定指代对象。
【解析】
1. 细节理解题：根据Step1中“And then draw the fish and sea plants with your crayons.”可知，Step1需要用到不同颜色的蜡笔，故选D。
2. 图示理解题：Step2的操作是将少量蓝色颜料倒入碗中，加水搅拌稀释，对应符合该操作的图示，故选C。
3. 代词指代题：前文提到“Wax resists, or stays away from the paint.”，说明蜡排斥颜料，因此“it”指代的是颜料，故选D。
【答案】
1.D 2.C 3.D
【知识点】
英语阅读理解、细节理解题、代词指代题
【点评】
本题结合英语阅读与化学实验原理，考查不同题型的解题能力，需学生准确提取原文信息，理解实验逻辑与代词指代关系，是中等难度的跨学科阅读题。
【难度系数】
0.6
本题为跨学科英语阅读理解题，包含细节理解、图示理解、代词指代三类题型。解题思路：先通读短文明确实验步骤与化学原理，再针对各小题定位原文对应信息：第1题查找Step1所需工具，第2题匹配Step2的操作内容，第3题结合代词所在句的上下文确定指代对象。
【解析】
1. 细节理解题：根据Step1中“And then draw the fish and sea plants with your crayons.”可知，Step1需要用到不同颜色的蜡笔，故选D。
2. 图示理解题：Step2的操作是将少量蓝色颜料倒入碗中，加水搅拌稀释，对应符合该操作的图示，故选C。
3. 代词指代题：前文提到“Wax resists, or stays away from the paint.”，说明蜡排斥颜料，因此“it”指代的是颜料，故选D。
【答案】
1.D 2.C 3.D
【知识点】
英语阅读理解、细节理解题、代词指代题
【点评】
本题结合英语阅读与化学实验原理，考查不同题型的解题能力，需学生准确提取原文信息，理解实验逻辑与代词指代关系，是中等难度的跨学科阅读题。
【难度系数】
0.6
