This new model of car is so expensive that it...

This new model of car is so expensive that it is ________ the reach of those young people with low pay.

A.against B.over C.below D.beyond

九年级英语单选题中等难度题查看答案及解析

This type of MP5 is so expensive that I can’t ______ it.

A．afford            B．spend            C．cost              D．pay

九年级英语单项填空中等难度题查看答案及解析

As the world becomes increasingly populated, it is also becoming alarmingly polluted. Fortunately, there are many ways that you can help deal with the negative effects that we impose(施加) on the environment. One of these is driving an electric car.

Electric cars produce about 80 percent less pollution than cars with gas-powered motors. In fact, the only reason that electric cars produce any pollution at all is that their electric energy is produced by power plants — electric cars themselves produce no waste. When energy comes from large sources such as power plants, it’s easier to control, so there’s less waste than if the energy is produced by many smaller sources, such as the gas engines in individual cars.

Furthermore, electric cars are simply more efficient than gas-powered cars for several reasons. First, electric cars have regenerative braking, which means that when you use the brakes in an electric car, the battery has a chance to recharge(再充电). On the contrary, when you brake in a gas-powered car, you actually use energy. Also, during the production of electric cars, more time and energy is spent making the design lighter and more aerodynamic so that there will be less drag(阻力) from the wind. This allows them to travel farther using less energy than a gas-powered car would use to go the same distance.

In addition to the environmental benefits of driving electric cars, there are also financial and time-saving benefits for the drivers. For one, they cost less to maintain(维修). The cost of charging an electric car is about 20 percent of the cost of gas, and electric cars require far less maintenance than gas-powered cars. This is due, in part, to the fact that electric cars have no cooling system, fan　　　　　　　　　　　　　　　　 belts, radiators, hoses, or oil — just a battery. There are fewer moving parts overall, so there are fewer possible problems. Also, after the body of an electric car gives out, the engine can be reused in another body. Electric cars can also save people time. While gas-powered cars require visits to a mechanic every few months, the only routine maintenance required by electric cars is replacing the battery every four years.

Overall, there are numerous benefits of driving an electric car. It may take a little getting used to, but in the long run, the use of electric cars can help preserve the environment and give people more time and money to be put to better use.

1.What can we learn from the second paragraph?

A.Less than 80 percent pollution is produced by cars.

B.Gas-powered cars get energy from power stations.

C.Electric cars themselves don’t produce any waste.

D.It’s difficult to control energy from power plants.

2.According to the passage, which of the following is TRUE?

A.The battery can be reused after the body of an electric car gives out.

B.Replacing the engine every four years is required for an electric car.

C.It may take no time to see the popularity of driving electric cars.

D.Electric cars cost less to maintain because of fewer moving parts.

3.What is the writer’s purpose of writing this passage?

A.To compare two kinds of cars.

B.To show a new way of driving.

C.To suggest driving electric cars.

D.To introduce a useful invention.

4.Which is the best title of the passage?

A.The Best Way to Protect the Environment

B.Electric Cars Are Worthy of a Second Look

C.The Greatest Invention in the New Century

D.Driving Electric Cars Saves Time and Money

九年级英语阅读单选中等难度题查看答案及解析

A toy car made of steel is more expensive than 　　　　 made of wood.

A. one　　 B. that　　 C. it　　 D. the one

九年级英语单项填空困难题查看答案及解析

The car is　　　　 expensive　　　　　　 he cannot buy it．

A. too；to　　　 　　　　 B. so；that

C. such；that　　　　　　 D. enough；to

九年级英语单项填空中等难度题查看答案及解析

The car is ________ expensive _______ he can’t buy it.

A. too; to         B. so; that               C. such; that      D. enough; that

九年级英语单项填空中等难度题查看答案及解析

The car is_______ expensive_______ I can’t afford it.

A.so; that　　 　 B.such; that

C.so;as to　　　　 D.enough; that

九年级英语单项填空中等难度题查看答案及解析

The car is_______ expensive_______ I can’t afford it.

A.so; that　　　 B.such; that

C.so;as to　　　　 D.enough; that

九年级英语单项填空中等难度题查看答案及解析

If you look at the top of your phone ,you'll usually see a little symbol that says 3G or 4G. The "G" stands for the "generation" of your mobile network.But these symbols will become things of the past after 5G fully arrives.

On March 30th, 2019, Shanghai vice-mayor Wu Qing made the first 5G video call on a Huawei Mate X smartphone, CGTN reported.Shanghai has also become the first city in China to start testing 5G networks.Monaco became the first country in Europe to use a next-generation 5G mobile phone network based on technology from Chinese company Huawei.

It sounds obvious, but it’s important to understand just how much faster 5G is compared to current 4G speeds. 5G will not only be many, many times faster than your existing connection, it will be greatly faster than the broadband connection you have at home.

Now, 4G takes about 100 to 200 milliseconds* to send and receive data.But 5G will get it down to 1 millisecond or less.This big change will not only make our mobile Internet faster. It can be used in many other ways as well.

For example,5G will help to make self-driving cars safer.Today's self ﹣ driving test cars have one problem ﹣ lag.When the car"sees"an obstacle*, it sends this information to a data center and receives instructions. However, it takes time to send and receive this information. With this kind of lag, the cars might crash because they don't receive instructions in time. With 5G, this lag will be greatly lowered, making the cars safer,according to CNN.

5G could also be used to power the Internet of Things (IOT). This refers to a large online network that connects all things and people.Fast Internet speeds will be the key to developing this technology. For example, with IOT under 5G, your fridge could automatically* place an order online for eggs when it finds that there are no eggs left inside.

All in all, 5G will shape every type of technology that it touches. And you won't have to wait too long for that to happen. Though we’ve seen a lot of positive progress just in the last year, we still have a long way to go before 5G is anywhere near as common as 4G is right now.

1.From Paragraph ②, we can know that _______.

A.5G is widely used in Shanghai

B.it took lots of efforts to test 5G

C.China and Monaco is working on its 5G networks

D.5G would make it possible to take videos

2.The underlined word "lag" probably means " _______" in Chinese.

A.延迟 B.迷路 C.暂停 D.耗电

3.The fridge is mentioned to _______.

A.describe the importance of IOT

B.encourage people to try the new product

C.introduce how to use the Internet of Things

D.show 5G would make IOT more powerful

4.Which of the following would be the best title of the passage？

A.Can 5G Go Far？

B.How is 5G Changing Our Life？

C.5G is on the Way

D.China is Leading the World in 5G

九年级英语阅读单选中等难度题查看答案及解析

How to Invent a Product

1.

It's unnecessary to think of something that no one has ever thought of before. Just ask yourself what exactly you are trying to improve or solve? If you want to build a better dust mop (拖把),how will it be better? What interesting or important part does it have? What could you do differently?

2.

Try coming up with 15 solutions in a minute, no matter how crazy. Or choose one of the solutions and ask how is that like my idea? "How and why does it work?" "When, where and how is it used?" "How is it described?" Let your questions and imagination come up with new ideas or find a different way of looking at a problem

3.

Visit stores that offer products similar to what yours will do and even go as far as to ask store workers for products they might sell with a similar purpose. If you have a name for your product created, search this to find out whether it is already being used.

4.

This is often the longest part of inventing! Thomas Edison's lab tested more than 6,000 different materials for light bulbs before they came up with one that worked. Make the model until it works the way you want. Sometimes you might discover an entirely different idea.

5.

When you think you've got everything ready, it's time to make a working model of your invention --- a prototype. This is what you'll use to show people what it will look like and how it will work. You can use this prototype to show and introduce to the people who might have interest.

A.Research your invention.

B.Brainstorm

C.Ask for advice.

D.Find a problem worth solving.

E.Make your invention to a reality.

F.Build, test, rebuild, repeat.

九年级英语补全短文6选5困难题查看答案及解析