Scienceand technology can be seen everywhere. They are making our life more conv-组卷网

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Science and technology can be seen everywhere. They are making our life more convenient(方便的) and comfortable. Some scientists recently added amazing ideas to four common things and made great changes to them.

It’s not just a phone.

China has taken the leading place in several scientific fields. In February, 2019, Huawei introduced Mate X, the first 5G phone that can be folded(折叠) in the world. It allows users to read e-books or watch movies on a larger screen. The Mate X supports(支持) 5G. It means you can get a movie from the Internet about 100 times faster than using 4G.

They are not just chopsticks.

Scientists at an American university have invented a pair of electronic chopsticks that can change the taste of food. When you put the chopsticks in your mouth, they can make you feel the taste becomes better, such as making sweet food taste sweeter or salty food less salty. Soon the scientists are going to try their technology on bottles, cups and spoons(勺子).

It’s not just a sticker(粘贴).

It’s said that about 52% of the fruits of the earth go bad before reaching the buyers. Scientists from Malaysia(马来西亚) thought of a simple way to solve the problem — tiny stickers that are made out of some natural materials(材料). Put the stickers on fruits, and the fruits can keep fresh up to two weeks.

They are not just shoes.

Every step you take is helping cut down air pollution. This is not in science fiction(科幻小说). A team from Europe has invented such a pair of shoes. The shoes can take in dirty air and send out clean air. If you wear the shoes and walk one kilometer, the shoes can clean the air polluted by eight cars.

【小题1】The first 5G phone that can be folded in the world is from ________.

A．China

B．Germany

C．Malaysia

D．America

【小题2】If you think your food is too salty, you can use the ________ mentioned in the passage.

A．spoons

B．cups

C．chopsticks

D．bottles

【小题3】The passage is mainly about ________.

A．the changes of mobile phones	B．the importance of living a healthy life
C．the way to keep fruits fresh for a longer time	D．the development of science and technology

19-20九年级下·江西南昌·开学考试

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In our daily life, robots are often found to do work that is too dangerous, boring, difficult or dirty. And we often see kids play with toy robots.

__________ There are some important characteristics (特征) that a robot must have. These characteristics might help you to know what is and what is not a robot. It will also help you to decide what you will need to build a machine before it can be considered as a robot. A robot has these important characteristics.

First of all, your robot would have to be able to feel the environment around it. Give your robot sensors (传感器): light sensors (eyes), touch sensors (hands), hearing sensors (ears) and so on.

A robot needs to be able to move around its environment. It can move on wheels (轮子), walk on legs or be driven by small engines (发动机). A robot can move either the whole body or just parts of it.

A robot needs to be able to make itself work. Some robots might make it with sunlight, some might with electricity (电).

A robot needs some kind of “smarts”. A programmer is the person who gives the robot its “smarts”. The robot will have to have a certain way to get the program so that it knows what it is and what to do.

【小题1】Choose the best sentence to fill in the blank “________” in Paragraph 2.

A．But what is a robot?	B．Robots are very popular with kids.
C．Let me tell you how to build a robot.	D．The robot is very useful these days.

【小题2】What does the underlined word “it” in Paragraph 2 refer to?

【小题3】What may the light sensors help a robot do?

【小题4】What’s the purpose of the passage?

A．To tell people the use of robots.	B．To describe the sensors of robots.
C．To tell what a robot can do in our life.	D．To help people know what a robot is.

阅读下面文字。从A到F选项中为每个段落选出一个最适合的标题

A. Collections B. Speaking C. Music D. Art. E. Reading F. Sports

Hello! I’m your AI robot Andy. Now let’s play a game. I’ll describe some kinds of activities. Please match the topic with the description. Are you ready? Go!

【小题1】It is a great way to teach you the importance of using your own hands to create something from nothing.
【小题2】 If you lose yourself in it, you can find a whole new world without leaving your house. And you can do better than non-readers in schoolwork and exams.
【小题3】They are physical activities. People compete against each other. Sometimes speed, skills and teamwork are needed.
【小题4】 Maybe you are not naturally more musical than others. If you enjoy singing, dancing or playing an instrument, they can become great hobbies.
【小题5】Whether they are stamps, coins, cards, model cars, or whatever else interests you, it’s a great way to learn about people and places.

①A new kind of desk with bike pedals (踏板) was invented in Mexico. Now, rows of the new desks are used in some schools.

②The bike desks are allowing students to power through their class work. While they are taking some light exercise, they can burn off fat. For students at a high school outside Monterrey, the desks offer benefits more than exercise.

③“When we’re physically active, it also helps us to behave well,” said a 13-year-old student. Now the bike desks are used in two classrooms, but the plan is to add them to all 21 classrooms step by step. Sanjuanita Garcia, the school’s head teacher, points to the bike desks’ benefits, especially for boys who are easily hurt because of being overweight.

④Mexico has a high obesity rate (肥胖率), with more than a third of its population dangerously overweight and more than 75% at a greater weight than is considered healthy. And as children age, many children’s weights keep increasing. A recent national study showed about 8% of children under 5 were overweight, which rose to almost 19% for kids 5-11 years old.

⑤Being overweight during early years causes a lot of dangers to children’s health, including increased risk of diabetes (糖尿病) and high blood pressure. Most children are influenced by weight problems in early life, and obesity in adulthood is known to contribute to heart disease and many other kinds of illnesses.