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You are the Cisco Network Designer in Cisco.com. Your company is using the G.711 codec with 802.11a access point radios. This can support a maximum of how many phones per access point?（）
A . 5
B . 10
C . 14
D . 20
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Every year thousands of lives（）in road accidents because of careless driving.
A、 lose
B、 lost
C、 have lost
D、 are lost
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Many cast iron pistons are designed with heat dams, which serve to （）
A . keep piston crown temperatures elevated for smoother combustion
B . reduce the possibility of overheating the top compression ring
C . help retain the heat of compression to prevent ignition delay
D . help retain the heat of compression to prevent combustion knock
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You are the Cisco Network Designer in Cisco.com. Which of these are important when determining how many users a NAS can support?（）
A . bandwidth
B . number of plug-ins per scan
C . total number of network devices
D . number of checks in each posture assessment
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Radio communication（）for many years and helps to save tens of thousands of lives.
A . has been used
B . have been used
C . has used
D . have used
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You are the Cisco Network Designer in Cisco.com. Which of these are important whendetermining how many users a NAS can support？（）
A . bandwidth
B . number of plug-ins per scan
C . total number of network devices
D . number of checks in each posture assessment
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Silk（）by Chinese for thousands of years now.
A . has used
B . has been used
C . was used
D . is used
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Thousands of people died of starvation during the（）in that African country.
A . objection
B . poverty
C . consumption
D . famine
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We （处理） thousands of enquiries every year.
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Building the new house ______ the family as many as twenty thousand dollars.
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The earthquake left thousands of people in _______ need of medical care.
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How many passengers was MV Mitali designed to carry？ 查看材料
A.500.
B.100.
C.400.
D.300.
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Thousands of Irish people starved during the "Potato Famine" because
A．they were so dependent on potatoes that they refused to eat anything else.
B．they were forced to leave their homeland and move to America.
C．the weather conditions in Ireland were not suitable for growing potatoes.
D．the potato harvest was bad.
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Hundreds of thousands of peasants pour into the city to try their (运气) every year.
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f you travel by air across the center of Africa or South America, you fly over forests for thousands of kilometers. 如果你坐飞机旅行穿越非洲中部或者南美洲，你就飞过了上万公里的森林。These great forests are the oceans of trees. There are thousands and thousands of different kinds of
plants and animals.
However, the world's forests are getting smaller all the time. We are cutting down the trees because we need wood, and we need more farmland. Some people say that there will not be any forests like these in 20 or 30 years. What will happen if they disappear？
If we cut down our forests, a lot of plants and animals will disappear from the world. In a lot of places the new farmland will soon look like the old deserts. Crops will not grow there. It will not rain very often, and the weather will get very hot. Perhaps the climate of the world will change. This will be dangerous for everyone in the world. That is why we must take care of our forests.
(1)、The passage mainly tells us about the importance of taking care of plants.
A：T
B：F
(2)、Forests are homes for different kinds of animals.
A：T
B：F
(3)、The need for more wood and more land help to protect our forests.
A：T
B：F
(4)、We'll have more and greater forestsn in 20 or 30 years in some people's view.
A：T
B：F
(5)、The writer thinks it necessary to protect the forests.
A：T
B：F
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Thousands of Irish people starved during the"Potato Famine"because
<img src='https://img2.soutiyun.com/ask/uploadfile/3024001-3027000/431060ea7e798b3a9a677db2ba44eaa5.gif' />
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The Mayan Indians lived in Mexico for thousands of years before the Spanish arrived in the 1500s. The Maya were an intelligent, culturally rich people whose achievements were many. The Mayan people knew a lot about nature and the world around them. This knowledge helped them to live a better life than most people of that time, because they could use it to make their lives more comfortable and rewarding. Knowledge about tools and farming, for instance, made their work easier and more productive.
In ancient Mexico there were many clearings in the forest. In each clearing was a village with fields of different crops around it. The Maya cut down trees with stone axes and planted seeds by digging holes in the ground with pointed sticks. A farmer was able to grow crops that produced food for several people. But not every Maya had to be a farmer. Some were cloth makers, builders, or priests.
The Maya believed in many gods. The people built large temples to honor their gods. Skillful workers built cities around these temples. It was difficult to construct these cities, because they had no horses to carry the heavy stone needed. Workers had to carry the building materials themselves. Today, many of these ancient Mayan cities and temples are still standing.
Measuring time was important to the Maya, so they developed a system for measuring it accurately. Farmers needed to know when to plant and harvest their crops. Mayan priests made a system to keep track of time. They wrote numbers as dots (...) and bars (- ). A dot was one and a bar was five.
The Mayan priests studied planets. They made a calendar from what they learned. The year was divided into. 18 months of 20 days each with five days left over. The Mayan calendar was far more accurate than the European calendars of the time.
Around the year 800, the Maya left their villages and beautiful cities, never to return. No one knows why. They may have died from an infectious disease. They may have left because the soil could no longer grow crops. Archaeologists are still trying to find the lost secrets of the Maya. They are still one of our greatest mysteries.
This article may be taken from ______.
A．a magazine
B．a literature book
C．an art book
D．a historical book
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Botany, the study of plants, occupies a peculiar position in the history of human knowledge. For not many thousands of years it was the one field of awareness about which humans had anything more than the vaguest of insights(了解). It is impossible to know today just what our Stone Age ancestors knew about plants. But from what we can observe of pre-industrial societies that still exist, a detailed learning of plants and their properties must be extremely ancient. This is logical. Plants are the basis of the food pyramid for all living things, even for other plants. They have always been enormously important to the welfare of peoples, not only for food, but also for clothing, weapons, tools, dyes, medicines, shelter, and a great many other purposes. Tribes living today in the jungles of the Amazon recognize literally hundreds of plants and know many properties of each. To them botany, as such, has no name and is probab-ly not even recognized as a special branch of "knowledge" at all.
Unfortunately, the more industrialized we become, the farther away we move from direct contact with plants, and the less distinct our knowledge of botany grows. Yet everyone comes unconsciously on an amazing amount of botanical knowledge, and few people will fail to recognize a rose, an apple, or an orchid. When our Neolithic ancestors, living in the Middle East about 10,000 years age, discovered that certain grasses could be harvested and their seeds planted for richer yields the next season, the first great step in a new association of plants and humans was taken. Grains were discovered and from them flowed the marvel of agriculture: cultivated crops. From then on, humans would increasingly take their living from the controlled production of a few plants, rather than getting a little here and a little there from many varie-ties that grew wild and the accumulated knowledge of tens of thousands of years of experience and intimacy with plants in the wild would begin to fade away.
It is assumed in the passage that early humans ______.
A．probably had extensive knowledge of plants
B．thought there was no need to cultivate crops
C．did not enjoy the study of botany
D．placed great importance on the ownership of property
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For thousands of years, people have known that the...
For thousands of years, people have known that the best way to understand a concept is to explain it to someone else. "While we teach, we learn," said Roman philosopher Seneca. Now scientists are bringing this ancient wisdom up-to-date. They&39;re documenting why teaching is such a fruitful way to learn, and designing innovative ways for young people to engage in instruction. Researchers have found that students who sign up to tutor others work harder to understand the material, recall it more accurately and apply it more effectively. Student teachers score higher on tests than pupils who&39;re learning only for their own sake. But how can children, still learning themselves, teach others？ One answer: They can tutor younger kids. Some studies have found that first-born children are more intelligent than their later-born siblings (兄弟姐妹). This suggests their higher IQs result from the time they spend teaching their siblings. Now educators are experimenting with ways to apply this model to academic subjects. They engage college undergraduates to teach computer science to high school students, who in turn instruct middle school students on the topic. But the most cutting-edge tool under development is the "teachable agent"—a computerized character who learns, tries, makes mistakes and asks questions just like a real-world pupil. Computer scientists have created an animated (动画的) figure called Betty&39;s Brain, who has been "taught" about environmental science by hundreds of middle school students. Student teachers are motivated to help Betty master certain materials. While preparing to teach, they organize their knowledge and improve their own understanding. And as they explain the information to it, they identify problems in their own thinking. Feedback from the teachable agents further enhances the tutors&39; learning. The agents&39; questions compel student tutors to think and explain the materials in different ways, and watching the agent solve problems allows them to see their knowledge put into action. Above all, it&39;s the emotions one experiences in teaching that facilitate learning. Student tutors feel upset when their teachable agents fail, but happy when these virtual pupils succeed as they derive pride and satisfaction from someone else&39;s accomplishment. 1. What are researchers rediscovering through their studies？ A.Seneca&39;s thinking is still applicable today. B.Better learners will become better teachers. C.Human intelligence tends to grow with age. D.Philosophical thinking improves instruction.
A、Seneca&39;s thinking is still applicable today.
B、Better learners will become better teachers.
C、Human intelligence tends to grow with age.
D、Philosophical thinking improves instruction.
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What do the thousands of light beams measure？
A．The focusing accuracy of the lens of the eye.
B．Eye color and vision.
C．Where the beams travel.
D．The reflection of the retina.
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Merchant and passenger ships are generally required to have a life preserver for every person aboard and in many cases, a certain percentage of smaller sizes for children.According to United States requirements, life preservers must design, reversible capable of being quickly adjusted to fit the uninitiated individual, and must be so designed as to support the wearer in the water in an upright or slightly backward position.
Sufficient buoyancy （浮力）to support the wearer should be retained by the life preserver after 48 hours in the water, and it should be reliable even after long period of storage.Thus it should be made of materials resistant to sunlight, gasoline, and oils, and it should be not easily set on fire.The position in which the life preserver will support a person who jumps or falls into the water is most important, as is its tendency to turn the wearer in the water from a face-down position to an upright or slightly backward position, with his face clear of the water, even when the wearer is exhausted or unconscious.
The method of adjustment to the body should be simple, and self-evident to uninitiated persons even in the dark under the confused conditions, which follow a disaster.Thus, the life preserver should be reversible that it is nearly impossible to get it on wrong.Catches, straps, and ties should be kept to a minimum.In addition, the life preserver must be adjustable to the wide variety of shapes and sizes of wearers, since this greatly affects the position of floating and the self-righting qualities.A suitable life preserver should also be comfortable to wear at all times, in and out of the water, not so heavy as to encourage to take it off on shipboard while the ship is in danger, nor so burdensome that it hinders a person in the water while trying to swim.
1.The passage is mainly about（）.
A.the uses of life preservers
B.the design of life preservers
C.the materials for life preservers
D.the buoyancy of life preservers
2.According to the passage, a life preserver should be first of all （）.
A.adjustableB.comfortableC.self-evidentD.self-righting
3.United States Coast Guard does NOT require the life preserver to be made （）.
A.with as few strings as possible
B.capable of being worn on both sides
C.according to each wearer's size
D.comfortable and light to wear
4.By “the uninitiated individual” （Para）1, Line.4.the author refers to the person （）.
A.who has not been instructed how to use a life preserver
B.who has a little experience in using a life preserver
C.who uses a life preserver without permission
D.who becomes nervous before a disaster
5.What would happen if a person were supported by the life preserver in a wrong position？
A.The waves would move him backwards.
B.The water would choke him.
C.He would immediately sink to the bottom.
D.He would be exhausted or unconscious.
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（翻译）1． SQL Server is designed to allow thousands of users to access the database at the same time and is a true client/server database system.2． An application software is any program designed to perf
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A company has a business application that provides its users with many different reports:receivables reports, payables reports, revenue projects, and so on. The company has just purchased some new, state-of-the-art, wireless printers, and a programmer has been assigned the task of enhancing all of the reports to use not only the company‘s old printers, but the new wireless printers as well. When the programmer starts looking into the application, the programmer discovers that because of the design of the application, it is necessary to make changes to each report to support the new printers.Which two design concepts most likely explain this situation？（）
A.Inheritance
B.Low cohesion
C.Tight coupling
D.High cohesion
E.Loose coupling
F.Object immutability
