As in the field of space travel, new technologies continue to appear in undersea exploration. They share a number of similarities with each other — as well as some important differences.
Manned submersibles (潜水器), like spaceships, must maintain living conditions in an unnatural environment. While a spaceship must simply be sealed against the vacuum space, a submersible must be able to bear extreme pressure if it is not to break up in deep water.
In exploring space, unmanned vehicles were employed before astronauts. In undersea exploration, on the other hand, men paved the way, and only recently have unmanned remote-operated vehicles (ROVs) been put to use.
One reason for this is that communicating with vehicles in orbit is much easier than talking to those underwater. A vacuum is an ideal medium for radio communications, but underwater communications are limited to much slower sound waves. Thus, most undersea vehicles — particularly ROVs — operate at the end of long ropes.(电缆终端)
For a similar reason, knowing where you are undersea is much more difficult than in space. A spaceship’s position can be located by following its radio signal, or by using telescopes and radar. For an undersea vehicle, however, a special network of sonar （声纳系统）devices must be laid out in advance on the ocean floor in the area of a dive to locate the vehicle’s position.
Though undersea exploration is more challenging than outer space in a number of respects, it has a distinct advantage: going to the ocean depths doesn’t require the power necessary to escape Earth’s gravity. Thus, it remains far less expensive.
1.The purpose of the passage is ______.
| A．to persuade you to explore the depths of the ocean |
| B．to stress the importance of the undersea exploration |
| C．to make you believe that the undersea exploration is better |
| D．to tell some differences between two kinds of explorations |
2. By saying “men paved the way” in Paragraph 2 the author means that in undersea exploration ______.
| A．unmanned vehicles were used in the beginning |
| B．men covered the ocean floor with stones and bricks |
| C．manned vehicles were employed before unmanned ones |
| D．men invented unmanned remote-operated vehicles in the past |
3.The sonar devices must be placed ______.
| A．from time to time |
| B．after the undersea vehicles dive |
| C．before the undersea vehicles dive |
| D．when the undersea vehicles are diving |
4.What can we infer from the passage?
| A．Submersibles usually break up in deep water. |
| B．Undersea vehicles can receive signals immediately. |
| C．Going to space needs power to escape the gravity. |
| D．Radio communications are quite difficult in a vacuum. |
高三英语阅读理解中等难度题
As in the field of space travel, new technologies continue to appear in undersea exploration．They share a number of similarities with each other — as well as some important differences．
Manned submersibles （潜水器）, like spaceships, must maintain living conditions in an unnatural environment．While a spaceship must simply be sealed against the vacuum space, a submersible must be able to bear extreme pressure if it is not to break up in deep water．
In exploring space, unmanned vehicles were employed before astronauts．In undersea exploration, on the other hand, men paved the way, and only recently have unmanned remote-operated vehicles （ROVs） been put to use．
One reason for this is that communicating with vehicles in orbit is much easier than talking to those underwater．A vacuum is an ideal medium for radio communications, but underwater communications are limited to much slower sound waves．Thus, most undersea vehicles — particularly ROVs — operate at the end of long ropes．（电缆终端）
For a similar reason, knowing where you are undersea is much more difficult than in space．A spaceship’s position can be located by following its radio signal, or by using telescopes and radar．For an undersea vehicle, however, a special network of sonar （声纳系统）devices must be laid out in advance on the ocean floor in the area of a dive to locate the vehicle’s position．
Though undersea exploration is more challenging than outer space in a number of respects, it has a distinct advantage: going to the ocean depths doesn’t require the power necessary to escape Earth’s gravity．Thus, it remains far less expensive．
1.The purpose of the passage is ______．
A．to persuade you to explore the depths of the ocean
B．to stress the importance of the undersea exploration
C．to make you believe that the undersea exploration is better
D．to tell some differences between two kinds of explorations
2.By saying “men paved the way” in Paragraph 2 the author means that in undersea exploration ______．
A．unmanned vehicles were used in the beginning
B．men covered the ocean floor with stones and bricks
C．manned vehicles were employed before unmanned ones
D．men invented unmanned remote-operated vehicles in the past
3.The sonar devices must be placed ______．
A．from time to time
B．after the undersea vehicles dive
C．before the undersea vehicles dive
D．when the undersea vehicles are diving
4.What can we infer from the passage?
A．Submersibles usually break up in deep water．
B．Undersea vehicles can receive signals immediately．
C．Going to space needs power to escape the gravity．
D．Radio communications are quite difficult in a vacuum．
高三英语阅读理解中等难度题查看答案及解析
As in the field of space travel, new technologies continue to appear in undersea exploration. They share a number of similarities with each other — as well as some important differences.
Manned submersibles (潜水器), like spaceships, must maintain living conditions in an unnatural environment. While a spaceship must simply be sealed against the vacuum space, a submersible must be able to bear extreme pressure if it is not to break up in deep water.
In exploring space, unmanned vehicles were employed before astronauts. In undersea exploration, on the other hand, men paved the way, and only recently have unmanned remote-operated vehicles (ROVs) been put to use.
One reason for this is that communicating with vehicles in orbit is much easier than talking to those underwater. A vacuum is an ideal medium for radio communications, but underwater communications are limited to much slower sound waves. Thus, most undersea vehicles — particularly ROVs — operate at the end of long ropes.(电缆终端)
For a similar reason, knowing where you are undersea is much more difficult than in space. A spaceship’s position can be located by following its radio signal, or by using telescopes and radar. For an undersea vehicle, however, a special network of sonar （声纳系统）devices must be laid out in advance on the ocean floor in the area of a dive to locate the vehicle’s position.
Though undersea exploration is more challenging than outer space in a number of respects, it has a distinct advantage: going to the ocean depths doesn’t require the power necessary to escape Earth’s gravity. Thus, it remains far less expensive.
1.The purpose of the passage is ______.
| A．to persuade you to explore the depths of the ocean |
| B．to stress the importance of the undersea exploration |
| C．to make you believe that the undersea exploration is better |
| D．to tell some differences between two kinds of explorations |
2. By saying “men paved the way” in Paragraph 2 the author means that in undersea exploration ______.
| A．unmanned vehicles were used in the beginning |
| B．men covered the ocean floor with stones and bricks |
| C．manned vehicles were employed before unmanned ones |
| D．men invented unmanned remote-operated vehicles in the past |
3.The sonar devices must be placed ______.
| A．from time to time |
| B．after the undersea vehicles dive |
| C．before the undersea vehicles dive |
| D．when the undersea vehicles are diving |
4.What can we infer from the passage?
| A．Submersibles usually break up in deep water. |
| B．Undersea vehicles can receive signals immediately. |
| C．Going to space needs power to escape the gravity. |
| D．Radio communications are quite difficult in a vacuum. |
高三英语阅读理解中等难度题查看答案及解析
As technology in the security field advances, so does the intelligence of the burglars in prevailing over this technology. Gone are the days when a simple alarm system, connected to your phone line, was enough to protect you from potential security risks.
Cellular alarm systems (蜂窝报警系统)are a replacement of the traditional wired phone line security networks. These systems work just like your cell phone. A cellular module is placed in the main control panel and it sends signals, without the use of wires, to the monitoring station. The cellular signal is sent via the data part of a cellular signal, much like a text message.
Sensors can be placed anywhere in your house. Whenever there is an emergency, the relevant sensor picks up the unusual activity and sends a cellular signal to the main control panel. The control panel serves more than one purpose, which sends a cellular signal at the same time to the monitoring service at the back end. The monitoring service later informs the relevant authorities in the form of high-pitched sirens (高音警笛声). Typically it takes a few minutes for emergency services to arrive at the scene. Depending on the efficiency of your monitoring service and the local authorities, help should arrive soon and deal with the potential threats.
It allows you to monitor your house remotely. All you have to do is simply access the cameras from your phone and keep a check for any unusual activities while you are not around. With cellular technology securing your house, you don’t have to worry about the power failure or even burglars cutting your phone lines.
Since these systems operate on batteries, you should be careful about when the batteries die out. There might be other appliances including microwave ovens and WiFi in the house that can cause disruption (干扰). Ensure that your cellular alarm system's range is not affected by the presence of these appliances. Many homeowners tend to go for wireless systems due to the ease of installation (安装）factor. However，keep in mind that a non-professional installation might actually leave the system easy to damage.
1.What do the underlined words ''prevailing over'' mean in Paragraph 1?
A.Improving. B.Defeating.
C.Worrying about. D.Looking into.
2.How can the authorities know an emergency is happening?
A.They hear high-pitched sirens.
B.They read the cellular signal.
C.They check the control panel online.
D.They notice the unusual activity via sensors.
3.What can we know about the cellular alarm system?
A.It looks like a phone. B.It is energy-saving.
C.It needs to be improved. D.It is wireless.
4.What's the purpose of the last paragraph?
A.To give cautions about the system.
B.To introduce the benefits of the system.
C.To call on people to watch out for security risks.
D.To teach people to install the system correctly.
高三英语阅读理解中等难度题查看答案及解析
, the farmer continued working in the field.
A. As tired he was B. As he was tired
C. Tired as he was D. So tired was he
高三英语单项填空中等难度题查看答案及解析
With the development of science, more new technology ______ to the fields of IT.
A. has introduced B. is being introduced
C. is introduced D. was introduced
高三英语单项填空中等难度题查看答案及解析
With the development of science, more new technology________to the field of IT.
A. has introduced B. is being introduced
C. is introduced D. was introduced
高三英语单项填空中等难度题查看答案及解析
With the development of science, more new technology ______to the field of IT.
| A．has introduced | B．is being introduced | C．is introduced | D．was introduced |
高三英语单项填空中等难度题查看答案及解析
If China’s space technology has achieved ____ breakthrough in this field, it really is ____ amazing wonder.
| A．the; an | B．a; an | C．不填; the | D．a; 不填 |
高三英语单项填空中等难度题查看答案及解析
If China’s space technology has achieved ____ breakthrough in this field, it really is ____ amazing wonder．
A．the; an B．a; an C．不填; the D．a; 不填
高三英语单项填空中等难度题查看答案及解析
Many Americans think of driverless cars as a futuristic technology that will revolutionize travel in cities and along state highways. But recent experiments are proving that autonomous vehicles also have the potential to improve the quality of life for millions of Americans underserved by traditional ways of transportation, such as the elderly and disabled, so long as lawmakers make smart policies that pave the way for innovation.
A retirement community in San Jose, Calif, which has been transformed by a small fleet (车队) of driverless taxis, shows the potential of self-driving cars to transform people’s lives. Built by a tech start-up called Voyage, the modified (被改进的) Ford Fusions are currently limited to a two-mile road, but residents are already having the benefits of these autonomous vehicles, which allow them to participate in social activities they would otherwise be unable to enjoy simply because they could not get to them.
When the trial run finally expands to 15 miles of road, these residents—whose average age is 76—will also have a convenient and reliable new way to appointments. As these cars continue to serve residents there, it is easy to understand why California is moving to simplify regulations for the industry.
In Michigan, forward-thinking policies have the potential to unlock other hidden benefits of autonomous vehicles, especially for those with physical disability. The Michigan Disability Rights Coalition has strongly advocated for the development of this technology, saying that it could give people with disabilities greater opportunities in the workforce and enable them to lead more fulfilling (满意的), independent lives.
Many recognize that autonomous vehicles will be the future of transportation, but it is too often overlooked that this future cannot arrive fast enough for millions of Americans who are forced to depend on others for day-to-day travel. The policymakers should follow the lead of places like California and Michigan, and pass rules and regulations to unlock these hidden benefits of driverless cars.
1.What’s the attitude of most American people to the future of autonomous vehicles?
A. uncertain B. optimistic
C. indifferent D. doubtful
2.What is the modified Ford Fusion?
A. A kind of autonomous vehicle. B. The name of a retirement community.
C. The collection of social activities. D. A two-mile road for self-driving cars.
3.Examples are given in the third and fourth paragraphs to prove ________.
A. how driverless technology benefits the aged and disabled
B. why driverless cars are restricted in many states in America
C. what are preventing the development of the technology
D. when driverless cars can enter people’s life eventually
4.What does the author attempt to inform us in the last paragraph?
A. The concept of autonomous vehicles has been widely recognized.
B. Regulations should go hand in hand with driverless technology.
C. The benefits of driverless cars have been fully unlocked.
D. The weak groups are often overlooked despite technology advances.
高三英语阅读理解困难题查看答案及解析