2026年知识与能力训练八年级英语上册沪教版第7页答案
I Reading comprehension.
Hey, boys and girls! Welcome to the science world. Today, we are going to do an experiment about the way light travels. We'll learn this by building a simple camera. It's easy, fun, and full of surprises. Let's begin!
① Materials
Cardboard box
Aluminum foil(铝箔纸)
Black tape
Paint
Needle
Wax aper
Scissors
Glue
② Steps
★Prepare a box: Paint the inside black.
★Make a window: On one side, cut a small square. From inside, stick the foil with glue.
★Make a pinhole: Use a needle to make a small hole in the foil's center.
★Add a screen: On the opposite side, cut a larger square. From inside, cover the hole with wax paper. This will be the screen.
★Close the box: Close the box with black tape. Make sure light can only enter through the pinhole.
③ Result
Take your camera into a ark room. Point the pinhole at something bright, like a candle(蜡烛). Now look at the wax paper screen. You will see a picture, and it is upside down! Can you guess why?

Point your camera at someone walking. How do they look?
Use your camera to see the sun. Does the sun look different?
(
C
) 1. What is the experiment about?
A. The speed of light. B. The color of light.
C. How light travels. D. How a camera works.
(
C
) 2. Which step does the picture on the right show?
A. Add a screen. B. Prepare a box.
C. Make a pinhole. D. Make a window.
(
B
) 3. How does light finally get into the box?
A. Through the wax paper screen.
B. Through the tiny hole in the foil.
C. Through the tape around the box.
D. Through the four sides of the box.
(
A
) 4. Point the pinhole at the candle , which picture will you see?
(
B
) 5. What is the best title for part ④?
A. Rule B. Exploration C. Reason D. Comment

答案

1-5 C C B A B

解析

【分析】本题为英语阅读理解题,围绕针孔相机实验展开,共5道选择题。解题时需先通读原文,明确实验主题、步骤、结果等信息,再结合题目要求逐一分析选项:第1题定位原文实验主题句;第2题匹配插图与实验步骤;第3题查找光进入盒子的途径;第4题结合针孔成像常识判断;第5题概括第④部分的主旨。
【解析】1. 细节理解题:原文开头明确提到“do an experiment about the way light travels”,即实验主题是光的传播方式,对应选项C。2. 步骤匹配题:插图对应制作针孔的步骤(用针在铝箔中心扎小孔),对应选项C。3. 细节理解题:实验步骤中说明“light can only enter through the pinhole”,即光通过铝箔上的小孔进入,对应选项B。4. 常识应用题:针孔成像的特点是成倒立的像,对应选项A。5. 主旨大意题:第④部分是让学生进行的探索活动,标题应为“Exploration”,对应选项B。
【答案】1-5 C C B A B
【知识点】英语阅读理解、细节理解、主旨大意
【点评】本题结合科学实验场景考查英语阅读能力,既需要学生查找原文细节,也需结合基础常识,题型常规,难度适中。
【难度系数】0.6