—Good news！Self－driving cars will come into u...

—Good news！Self－driving cars will come into use in one or two years.

—Really？We're expecting to see how they ________.

A. are making　　 B. are made　　 C. make　　 D. will make

九年级英语单选题中等难度题查看答案及解析

A major development to self-driving cars may change the way we will drive in the future. Google, the leading company in self-driving technology, has changed its develop plan. It had driverless cars built by car factories, but now it will start building its own cars.

Google has started to build some kinds of experimental electric self- driving cars that look like a Smart car or Fiat 500. There is no steering wheel(方向盘)，gas pedal or brake. The only things a human passenger controls are a red “e-stop” button(按钮) for fear stops and a start button. The car’s only “friendly” face is designed to make it help people accept self-driving technology.

Google workers took part in a long experiment, in which they used self-driving cars for their usual travel to work. No accident happened, but Google’s heads realized that depending on a human passenger to drive in an emergency(紧急情况) wouldn’t work because they may be reading, working , or sleeping. Now the self-driving car drives by itself if the driver takes his hands off the wheel for over ten seconds.

Google’s self-driving cars are now limited(限定) to a speed of 25 miles per hour for safety reasons. The cars aren’t allowed to drive on highways. However, a Google engineer said that once the cars are solved to run safely, we can drive at the speed of 50, even 80 miles an hour.

Google recently announced that its cars had covered 700,000 miles of public roads, and they were now running in busy city streets. People who love self-driving cars say this will improve transport by making roads safer, cutting down accident, and making less pollution.

Of course, there’s no need to look for parking at a crowded shopping mall. Instead, users could let their self-driving cars drop them off to park itself. A mother who took a test ride said that having the car would allow her more time to catch up with her son. The cars could also allow people who　 might not be able to drive to enjoy the hand-free driving. And drunk driving? Not a problem. It is　 very likely that by 2020, driverless cars will be common. Do you believe so?

1.What equipment do the self-driving cars have?

A. A gas pedal.　　　　　　　　 B. A brake.

C. A steering wheel.　　　　 D. An “e-stop” button and a start button

2.How fast can people drive a self-driving car now?

A. 25 miles an hour.　　　　　 B. 50 miles an hour.

C. 80 miles an hour.　　　　　 D. 100 miles an hour.

3.What has Google company already done?

A.Google has changed its development plan and helped other factories make cars.

B.Google has already had car-testing experiments in all the states in the US.

C.Google has realized some problems and tried to solve them.

D.Google has asked its own workers to buy the cars and travel to work.

4. Which advantage of self-driving cars is not mentioned ?

A.They can start the engine by itself and make people’s hands completely free.

B.They can help to solve air pollution and reduce car accident.

C.They can park by themselves and make mothers look after young kids easily.

D.They can help those disabled people to enjoy the driving.

5.What will happen if emergency happens when someone is driving a driverless car?

A.If the driver presses the “e-stop” button, the car will drive by itself at once to keep safe.

B.If the driver is reading, working or sleeping, he can’t handle the situation in time.

C.The car’s friendly face will work and help the driver accept the situation and stay calm.

D.The self-driving car will break the speed limit and run at a speed that the driver tells it.

九年级英语阅读理解中等难度题查看答案及解析

阅读下面的短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。

Self-driving Cars

Do you like cars?1.will the car be like in the future? Maybe we can sit in a car that can drive2.(it).

About 40 years ago, scientists from the United States3.(start) to develop self-driving cars. The most famous one4.(make) by Google in 2012. There are cameras and radars(雷达）on the top of the car. They allow the computer in the car5.(draw) a 3D map of the environment. Chinese scientists have also6.(successful) developed a self-driving car. The car made a trip7.Changsha to Wuhan.

Is a self-driving car safe? A recent study shows that robots make8.(safe)drives than humans. If 10% of cars on the street are self-driving ones, 1, 000 lives will be saved every year. If 90% of vehicles(交通工具)are self-driving ones, 21, 700 lives will be saved a year. However, a self-driving car is expensive9.each costs about $100,000. So it is10.(possible)to be very popular in the near future.

九年级英语语法填空中等难度题查看答案及解析

When the traffic lights turn red, we will stop driving a car or crossing a street. Why is red used for traffic lights instead of other colors?

As we know, scattering (散射) happens when light goes through the air. For the same media(媒质), if the wavelength is long, the scattering will be short. If the wavelength is short, then the scattering will be long.

Of all lights we can see red has the longest wavelength, so the scattering is the weakest. That means the red light travels far. In fact, it travels farther on rainy days.

Using the red light can help drivers in farther areas sec the lights. It helps drivers stow down or stop in lime. If drivers don't see the red light until they are close, they may not be able to stop the car in time. An accident may happen Red can also excite people. We can act more quickly when we see the color red. In a word, red lights help drivers stop in time and help prevent accidents.

1. When the traffic lights turn ______, we will stop driving a car.

A. red    B green     C. yellow

2.According to the passage, the scattering of the red light is the _______.

A. longest    b. weakest       C. farthest

3. The underlined word "wavelength" means________ in Chinese.

A.波浪        B.光波      C.波长

4. What can the red light help drivers do?

A. It can help drivers in farther areas see the lights.

b. It can help drivers slow down or stop in time.

C. A and b

5.Which of the following is the best title?

A. Why do accidents happen

b. How does the red light travel

C. Why do we use red traffic lights

九年级英语阅读理解中等难度题查看答案及解析

My second-hand car is broken again. I either have it ________ or buy a self-driving car. 5G makes everything possible.

A.to repair B.repaired C.repair

九年级英语单选题简单题查看答案及解析

–Good news. We will have a ______ holiday.

--I’ve heard of it. But it’s coming in_______.

A. three days, here days’ time　　　 B. three days’, three days’

C. three-day, three days　　　　　　　　 D. three days, three-day time

九年级英语单项填空简单题查看答案及解析

—Good news.  We will have a________holiday.             .

—I’ve heard of it.  But it’s coming in ________.

A. three days; three days’  time                B. three days’; three days'   .

C. three-day; three days                        D. three days; three-day time

九年级英语单项填空中等难度题查看答案及解析

—Good news! We will have a ________ holiday.

—I’ve heard of it. But it’s coming in ________.

A. three days; three days’ time B. three days’; three days’

C. three-day; three days D. three days; three-day time

九年级英语单选题中等难度题查看答案及解析

—Good news.We will have a ________holiday.

—I’ve heard of it.But it’s coming in ________.

A．three days；three days’　 time

B．three days’；three days’

C．three­day；three days

D．three days；three­day time

九年级英语单项填空中等难度题查看答案及解析

—Good news.We will have a _______holiday.

--I’ve heard of it.But it’s coming in_______.

A.three days;three days’ time       B.three days’;three days’

C.three-day;three days          D.three days;three-day time

九年级英语单项填空中等难度题查看答案及解析