【推荐1】 A healthy diet may not offset (抵消) the effects of a high salt intake on blood pressure, suggests a new study. The research, from scientists at a number of institutions, studied the diets of over 4,000 people. The results showed that people eating higher amounts of salt had higher blood pressure — no matter how healthy a person’s overall diet.

The scientists behind the research are now advising people to monitor their salt intake-and food companies to lower the salt content in their products.

High blood pressure affects more than one in four adults in the UK, and increases the risk of a number of conditions including heart attacks and stroke. It’s thought that vitamins and minerals in fruit and vegetables might in some way affect blood vessels (血管), enabling them to lower blood pressure. Previously, experts believed that eating high amounts of fruit and vegetables might help offset the effects of high salt on blood pressure. However, while these foods do tend to lower blood pressure, the new research suggests they do not offset the adverse influence of high salt intake.

In the paper, the team studied data from the so-called INTERMAP study. In this study published in 2018，scientists tracked the diets of 4, 680 people, aged 40-59, from the USA, the UK, Japan and China. The researchers found a link between high blood pressure and high salt intake, even in people who were on a healthy diet.

The recommended upper limit of adult salt intake in the UK is 6 g a day. The study found that the average salt intake across the study was 10.7 g a day. The average intake for the UK was 8.5 g while the intake for the USA, China and Japan were9.6g, 13.1 g and 11.7 g respectively.

Increasing salt intake above this average amount was linked 10 an increase in blood pressure. Dr Queenie Chan, joint lead author of the research, said the research shows the importance o cutting salt intake.

1. What can food industry do to help lower people’s high blood pressure?

A．Take control of their salt production.

B．Monitor the quality of their products.

C．Cut down salt content in their products.

D．Make salt-free food only.

2. What does the underlined word “adverse” in paragraph 3 mean?

A．Adventurous.

B．Harmful.

C．Brief.

D．Average,

3. Which of the following nations has the highest average salt intake?

A．The USA.

B．The UK.

C．China.

D．Japan.

4. What can be the best title for the text?

A．High blood pressure is related to high salt intake

B．A healthy diet may not offset high salt intake

C．Research shows the importance of cutting salt intake

D．People eating higher amounts of salt have higher blood pressure

【推荐2】“Have a dream. Don’t be afraid to want something.” That’s the advice from Florence Bergeron, associate director of knowledge mobilization (动员) for the Students Commission of Canada. The group organized the country’s annual “Take Our Kids to Work Day” initiative on November 1.

Across Canada, ninth-grade students had the chance to visit the workplace of a parent, relative or friend. Bergeron said over 450,000 people participated this year.

The initiative began in 1994. “The principle was to bring their own children into the workplace so they could see what their parents were doing and prepare for taking on that same role,” Bergeron explained. The purpose of the day has changed over the years, as many kids now follow careers different from their parents’.

According to Dorota Peacock, who is the district coordinator for career education in the Surrey School District in British Columbia, the event is beneficial in various ways. “It’s valuable for exposing students to what people do in the adult workforce that they normally wouldn’t see,” Peacock said. “They get to ask questions and decide what’s interesting.”

Peacock added that students also learned what they were loath to do, which was just as valuable. That was the case for three ninth graders from Ecole Salish Secondary School in Surrey. Mia Kim, Rithi Murugaselvam, and Eljie Salimbagat said that they enjoyed visiting their parents’ workplaces, but realized that they, themselves, would likely follow different paths. Rithi,14, who visited a day care center where her mother worked, said that “much patience is required for working with kids.”

All three students agreed that learning to socialize is essential, no matter what career path you follow. “I learned that for a lot of jobs, you needed to learn how to communicate with others to be successful,” said Mia, 13.

Peacock hoped that the event inspired Canada’s ninth graders to have a deeper appreciation for their parents. “They are smart, productive people, and not just people who come home and help with homework and make meals,” Peacock said. “They’re an actual person in the world doing really cool things.”

1. What was the purpose of the initiative?

A．To expose children to the busy life.	B．To prepare students for their career options.
C．To improve parent-child relationships.	D．To educate children on possible changes.

2. What does the underlined word “loath” in paragraph 5 mean?

A．Unwilling.

B．Nervous.

C．Ready.

D．Eager.

3. Which of the following is a must in all careers according to the three students?

A．The ability to adapt.	B．The adventurous spirit.
C．The sense of success.	D．The communication skill.

4. What does Peacock probably want to say in the last paragraph?

A．Family count above all else.	B．Parents’ work is much more meaningful.
C．Children should admire their parents.	D．Children lack appreciation for housework.

【推荐1】Chinese spacecraft finds lunar soil could make oxygen and fuel on the moon.

Lunar soil could be used to make oxygen and other products from chemical reactions that mimic photosynthesis (模拟光合作用), according to an analysis of samples brought back to Earth by the Chang’e 5 spacecraft. Reliable supplies of such substances are necessary for any future lunar base.

It is expensive to send goods into space, so any material that can be found on the moon and that doesn’t have to be brought from Earth can save a lot of money.

Yingfang Yao at Nanjing University, China, and his team examined a lunar soil sample to see if it could be used as a catalyst(催化剂)for a system that would transform carbon dioxide and water released by astronauts’ bodies into oxygen, hydrogen and other useful by-products that could be used to power a lunar base.

Yao and his team first analysed their sample using techniques to identify catalytically active components of the soil. They found high levels of iron and magnesium-based compounds (复合物)that could be useful in a reaction mimicking the photosynthesis that occurs in green plants.

The researchers then tested the soil as a catalyst in various chemical reactions that would form part of a photosynthesis—like process to produce hydrogen and oxygen from CO₂ and water. They found that the soil’s efficiency wasn’t as good as catalysts we have on Earth and isn’t currently good enough to generate products in sufficient quantities to support human life on the moon, but that slight adjustments to the structure and composition of the lunar soil sample might see significant improvements.

1. What’s the significance of the finding about lunar soil’s products from chemical reactions?

A．It provides efficient support for future lunar base.

B．It gives evidence for plants to grow outside Earth.

C．It makes clear how the moon is mostly made up of.

D．It tells how photosynthesis happens on the moon.

2. What’s the aim of Chinese scientists’ study about lunar soil?

A．To find some useful mines that are rare on the earth.

B．To find its difference and similarity from the earth.

C．To know if it contains oxygen, and other by-products.

D．To know if it transforms some elements into useful thing.

3. What can be inferred about the lunar soil from the last paragraph?

A．We need to do further research about it.

B．It can’t mimic photosynthesis at present.

C．It can only be used as soil for plant growing.

D．Its efficiency is better than catalysts on Earth.

4. Which of the following can best describe the finding of the lunar soil?

A．Complicated.	B．Common.
C．Significant.	D．Normal.

【推荐2】The space community is taking the orbital debris (碎片) threat increasingly seriously these days. Multiple satellite “mega-constellations (巨型星座)” are in the works, making space traffic management and space-junk removal more pressing issues than they’ve ever been.

For instance, SpaceX has already launched more than 1,700 satellites for its Starlink broadband constellation. The company ultimately wants to launch around 30,000Starlink satellites into orbit. One Web has launched more than half of the satellites for its planned 648-member constellation, which may also grow beyond that initial number as time goes on.

In addition, satellite construction costs continue to fall, allowing more and more people to get satellites up and operate them—including folks with very little experience in the field. This opening of the final frontier is generally a good thing, but it further highlights the need for responsible action when it comes to satellite operation. In 2019, for example, the Space Safety Coalition (SSC) laid out a set of proposed voluntary guidelines designed to control space junk over the coming years.

One recommendation is that all satellites operating above 250 miles be equipped with propulsion(推进) systems, allowing them to get away from possible collisions (碰撞). The SSC also recommends operators who control satellites in low Earth orbit should include in their launch contracts a requirement that rocket upper stages should be got rid of in the atmosphere shortly after liftoff.

More active debris-fighting strategies could also be part of the solution. Removing just a handful of rocket bodies or dead satellites every year could help us keep our space-junk problem under control, according to some studies. And researchers around the world are developing and testing ways to do just that, using nets, harpoons(鱼叉) and other methods.

The space-junk issue is a global one, so governments around the world should have conversations about how to deal with it. Let’s hope the talks, the decisions and the tech end up outpacing the problem.

1. What do the two examples in Paragraph 2 illustrate?

A．Orbital debris ensure satellite safety.

B．Constellations consist of many satellites.

C．Space is becoming increasingly crowded.

D．SpaceX has higher capacity to explore space.

2. Why can more people send satellites into orbit?

A．Experience in this area is rich.

B．Satellites are cheaper to make.

C．Satellite operations require little skills.

D．Space is accessible to common people.

3. What is an effective way to control space junk?

A．Remove dead satellites from orbit.

B．Cooperate in monitoring satellites.

C．Operate satellites at a fixed height.

D．Recycle a rocket shortly after liftoff.

4. Which of the following is a suitable title for the text?

A．Space junk cleanup

B．The risks of space junk

C．Space debris and satellites

D．Guidelines for space safety

【推荐3】Over 5 million shared bikes in China are using services offered by Beidou Navigation Satellite System (北斗卫星导航系统).These shared bikes all use Beidou-based positioning chips (芯片).

The chips have high qualities. They can deal with information accurately and quickly. They feature low power consumption They provide a better user experience and easier management for the local companies. Now,several new models of shared electric bikes with Beidou-based chips have also started to be produced and put into market. Besides positioning and navigation, the chips will help users and shared bike companies record users’ speed and battery condition of an electric bike. The possible crimes during the bike using will also be recorded.

In fact,years ago, shared bike companies began to use positioning chips which worked well with both GPS and Beidou services.After the Beidou system became fully in use in the summer of 2020,shared bike companies started installing (安装) Beidou-based chips on more bikes in more areas.The latest chips which are popular with shared bike companies are smaller and have more advantages over the old types.

Since 2000,a total of 59 Beidou satellites have been lifted from the Xichang Satellite Launch Center in Sichuan Province. After the final satellite was lifted in 202the system was completed and started providing global services.Beidou Satellite System is designed and developed by China and it is one of four global navigation networks,along with the United States’ GPS,Russia’s GLONASS and the European Union’s Galileo.

According to a research in 2022, by the end of 2021 the total value connected with satellite navigation and positioning services in China was 469 billion yuan，a 16.3%increase year-on-year. More than 500,000 Chinese people now work at around 14,000 China’s companies and organizations doing business connected with Beidou and other satellite navigation and positioning services.

1. What can users benefit from the new models of shared electric bikes with Beidou-based chips?

A．They can speed up while riding

B．They can record crimes.

C．They can know their speed.

D．They can get the batteries charged

2. How many are there global navigation networks in total?

A．4.

B．5.

C．6.

D．7.

3. What can we infer from the last paragraph?

A．More and more people take shared bikes to work.

B．Employment has risen because of new technology

C．Shared bikes will be more and more popular in China

D．We must rise to the challenges of new technology

4. What does the passage mainly talk about?

A．Application of chips in China,

B．Development of shared bikes in China.

C．Promotion of new technology and its products.

D．The Applications of Beidou Navigation Satellite System