- Câu hỏi 738336:
Read the text and answer the question.
When was the last time you saw a frog? Chances are, if you live in a city, you have not seen one for some time. Even in wet areas once teeming with frogs and toads, it is becoming less and less easy to find those slimy, hopping and sometimes poisonous members of the animal kingdom. All over the world, even in remote jungles on the far side of the globe, frogs are losing the ecological battle for survival, and biologists are at a loss to explain their demise. Are amphibians simply over-sensitive to changes in the ecosystem? Could their rapid decline in numbers be signalling some coming environmental disaster for us all?
What is best heading for the paragraph?
A. The mystery of amphibian decline.
B. Frogs declining in number.
C. Frogs making changes to the ecosystem.
D. Multi-coloured frog species cause problems
- Câu hỏi 738341:
Read the text and choose the best answer.
Many young people from disadvantaged social classes join gangs. Gangs are groups of individuals who share a common identity. Some anthropologists believe the gang structure is one of the most ancient forms of human organization. Gangs are often associated with criminal activities.
Street gangs tend to be populated with young people from low income or impoverished homes. In contrast, organized crime gangs such as the Italian-American Mafia usually occupy the middle or upper class stratum of society.
Gangs usually take over a territory in a city or suburb. They call this territory their "turf." One common criminal activity on their turf is "providing protection." This is a common style of extortion in which a gang provides protection from its own members for money.
Since the 1970s, many gangs have been associated with selling drugs. The most problematic substance associated with gangs is crack cocaine. They are also known to commit burglaries, car theft, and armed robberies.
Individual members of gangs are usually referred to as gangsters. These members frequently join in their teens. This is often the result of early exposure to drugs and violence. Low-income housing projects and poor neighborhoods are ideal locations for gangs to exist and thrive.
Sometimes, new recruits for a gang are "jumped in." This is when the other gang members beat up the new recruit to test their dedication and loyalty. Recruits must also sometimes commit a crime such as robbery, rape, or murder to gain entry.
Once in a gang, there are only two ways for a member to quit. One way is for the member to die. The other way is for the member to desert the gang. The deserting of a gang usually gains the deserter a death sentence from the other gang members.
Members of gangs have a very short life expectancy. Because of this lifestyle, morality is often ignored. Criminal acts of violence are not a taboo. In fact, violence is often seen as a way to gain honor and prestige within the gang.
According to the passage, how can a person stop being a gang member?
A. Leave the gang
B. Fight against other members
C. Recruit a new members
D. Steal money
- Câu hỏi 738347:
Read the article and choose the correct answer, A, B, C or D.
According to airline industry statistics, almost 90 percent of airline accidents are survivable or partially survivable. But passengers can increase their chances of survival by learning and following certain tips. Experts say that you should read and listen to safety instructions before takeoff and ask questions if you have uncertainties. You should fasten your seat-belt low on your hips and as tightly as possible. Of course, you should also know how the release mechanism of your belt operates. During takeoffs and landings, you are advised to keep your feet flat on the floor. Before takeoff you should locate the nearest exit and an alterative exit and count the rows of seats between you and the exits so that you can find them in the dark if necessary.
In the event that you are forewarned of a possible accident, you should put your hands on your ankles and keep your head down until the plane comes to a complete stop. If smoke is present in the cabin, you should keep your head low and cover your face with napkins, towels, or clothing. If possible, wet these for added protection against smoke inhalation. To evacuate as quickly as possible, follow crew commands and do not take personal belongings with you. Do not jump on escape slides before they are fully inflated, and when you jump, do so with your arms and legs extended in front of you. When you get to the ground, you should move away from the plane as quickly as possible, and never smoke near the wreckage.
Travelers are urged by experts to read and listen to safety instructions ……………
A. if smoke is in the cabin
B. before takeoff.
C. before locating the exits.
D. in an emergency.
- Câu hỏi 738351:
Read the text and Decide that the following statements are TRUE (T), FALSE (F) or NOT GIVEN (NG).
Anyone can set up a site; promoting your club, your institution, your company's products or simply yourself, is what the Web and the Internet is all about. And what is more, information on the Internet is not owned or controlled by anyone organisation. It is, perhaps, true to say that no-one and therefore everyone owns the 'Net'. Because of the relative freedom of access to information, the Internet has often been criticised by the media as a potentially hazardous tool in the hands of young computer users. This perception has proved to be largely false however, and the vast majority of users both young and old get connected with the Internet for the dual purposes for which it was intended – discovery and delight.
According to the author, the Information Superhighway may be the future hope of education.
- Câu hỏi 113843:
Read the text and decide that the statement is True (T), False (F) or Not Given (NG).
Although the central region of Mexico's high plateau has been inhabited for at least 20,000 years, Mexico City only dates back to the 14th century. The Aztecs, or Mexica, had reached this area in the previous century, eventually settling on an island in Lake Texcoco. Here, in 1325, the city of Tenochtitlan began to take shape.
The lake was shallow, and during the nearly 200 years until 1519, the Aztecs expanded the inhabited area by land refill and the creation of artificial islands. Canals were dug for the transportation of goods and people. Aqueducts were constructed to bring drinking water from natural springs outside the city, dams to protect it against floods, and causeways and bridges to connect the city with the shore. There were many houses, palaces, temples, squares, markets and even a zoo. Perhaps the most striking construction of this period is the Templo Mayor, a double pyramid which still survives. As the capital of an empire stretching from Texas to Honduras, Tenochtitlan was a magnificent and important city. When the Spanish arrived, they called it the 'Venice of the New World'.
The area where people lived was artificially increased between 1325 and 1519.
- Câu hỏi 113844:
Read the text and choose the best answer.
In view of the inexorable progress in science, we can expect that the gene hunters will be replaced in the spotlight. When and by whom? Which kind of hunter will dominate the scene in the last decade of our waning century and in the early decades of the next? I wonder whether the hunters who will occupy the spotlight will be neurobiologists who apply the techniques of the enzyme and gene hunters to the functions of the brain. What to call them? The head hunters. I will return to them later.
The author implies that the most important medical research topic of the future will be
A. the operation of vitamins
B. the structure of gene
C. inherited diseases
D. the functions of the brain
- Câu hỏi 113846:
Read the text and choose the best answer.
The first two decades of this century were dominated by the microbe hunters. These hunters had tracked down one after another of the microbes responsible for the most dreaded scourges of many centuries: tuberculosis, cholera, diphtheria. But there remained some terrible diseases for which no microbe could be incriminated: scurvy, pellagra, rickets, beriberi. Then it was discovered that these diseases were caused by the lack of vitamins, a trace substance in the diet. The diseases could be prevented or cured by consuming foods that contained the vitamins. And so in the decades of the 1920's and 1930's, nutrition became a science and the vitamin hunters replaced the microbe hunters.
In the 1940's and 1950's, biochemists strived to learn why each of the vitamins was essential for health. They discovered that key enzymes in metabolism depend on one or another of the vitamins as coenzymes to perform the chemistry that provides cells with energy for growth and function. Now, these enzyme hunters occupied center stage.
You are aware that the enzyme hunters have been replaced by a new breed of hunters who are tracking genes-the blueprints for each of the enzymes-and are discovering the defective genes that cause inherited diseases-diabetes, cystic fibrosis. These gene hunters, or genetic engineers, use recombinant DNA technology to identify and clone genes and introduce them into bacterial cells and plants to create factories for the massive production of hormones and vaccines for medicine and for better crops for agriculture. Biotechnology has become a multibillion-dollar industry.
In view of the inexorable progress in science, we can expect that the gene hunters will be replaced in the spotlight. When and by whom? Which kind of hunter will dominate the scene in the last decade of our waning century and in the early decades of the next? I wonder whether the hunters who will occupy the spotlight will be neurobiologists who apply the techniques of the enzyme and gene hunters to the functions of the brain. What to call them? The head hunters. I will return to them later.
What is the main topic of the passage?
A. The progress of modern medical research
B. The discovery of enzymes
C. The potential of genetic engineering
D. The microbe hunters
- Câu hỏi 113857:
Read the text and decide that the statement is TRUE (T), FALSE (F) or NOT GIVEN (NG).
You are aware that the enzyme hunters have been replaced by a new breed of hunters who are tracking genes-the blueprints for each of the enzymes-and are discovering the defective genes that cause inherited diseases-diabetes, cystic fibrosis. These gene hunters, or genetic engineers, use recombinant DNA technology to identify and clone genes and introduce them into bacterial cells and plants to create factories for the massive production of hormones and vaccines for medicine and for better crops for agriculture. Biotechnology has become a multibillion-dollar industry.
Everyone uses recombinant DNA technology to identify and clone genes.
- Câu hỏi 113873:
Read the text and choose the best answer.
One of the most renowned Spanish architects of all time was Antoni Gaudi. Gaudi's emergence as one of 's preeminent artists at the end of the nineteenth century marked a milestone in the art world.
Gaudi's popularity helped to bring about the acceptance and rebirth of the Catalan language, which had been banned during the literature and art. Gaudi shares his Catalonian background with two other famous Spanish artists, Pablo Picasso and Miro. The diverse ethnic background of the region greatly influenced the work of Picasso and Miro, as well as Gaudi. Thus, their works were a combination of an old history and an active, vivid imaginary world. This has sometimes been referred to as the “Catalan Mind.” Yet it was perhaps Gaudi who had the greatest talent for bringing together diverse groups, ones which others viewed as being too diametrically opposed to be capable of coming together and co-existing amicably.
This was apparent not only in the artists and other individuals who surrounded him, but also in the varied styles and techniques he employed in his architecture. Much of his work can be seen in , where his structures are known as a fine representation of modernism. He also used a great variety of color in his buildings, and this art nouveau is often associated with his own unique style of design. All of these factors are what helped put him at the forefront of art movements to come: his unique ability to take on and transform traditional Spanish elements with the emerging diverse ethnic groups, merging these with his own fertile imagination, and consequently turning these forces into some of the greatest architecture the world has ever seen.
Gaudi’s first language was....
A. Spanish
B. Catalan
C. Portuguese
D. Castilian
- Câu hỏi 113880:
Read the text and decide that the statement is TRUE (T), FALSE (F) or NOT GIVEN (NG).
This frightening scenario is in part the consequence of a dramatic increase over the last quarter century in the development of once natural areas of wet marshland; home not only to frogs but to all manner of wildlife. Yet, there are no obvious reasons why certain frog species are disappearing from rainforests in the Southern Hemisphere which are barely touched by human hand. The mystery is unsett1ing to say the least, for it is known that amphibian species are extremely sensitive to environmental variations in temperature and moisture levels. The danger is that planet Earth might not only lose a vital link in the ecological food chain (frogs keep populations of otherwise pestilent insects at manageable levels), but we might be increasing our output of air pollutants to levels that may have already become irreversible. Frogs could be inadvertently warning us of a catastrophe.
There are many reasons why certain frog species are disappearing from rainforests in the Southern Hemisphere.
