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[主观题]

The most urgent thing is to find a dump for those toxic industrial wastes.A．imminentB．recy

The most urgent thing is to find a dump for those toxic industrial wastes.

A．imminent

B．recyclable

C．smelly

D．poisonous

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发布时间：2020-09-17

更多“The most urgent thing is to find a dump for those toxic industrial wastes.A．imminentB．recy”相关的问题

第1题

The 12 weeks of summer were ______ to the survival of most of the restaurants and pubs.

A.likely

B.critical

C.emergent

D.urgent

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第2题

One should directly come to the Blur Building in the Expo 2002 and skip the rest because__

____.

A．it will be there temporarily

B．it's the most important expo work

C．it's not real and will vanish in the thin air

D．it's near Geneva

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第3题

Man's first roan invention, and one of the most important inventions in history, was the w

heel. All transportation and every machine in the world depend on it. The wheel is the simplest yet perhaps the most remarkable of an] inventions, because there are no wheels in nature no living thing was ever created with wheels. How, then, did man come to invent the wheel？ Perhaps some early hunters found that they could carry it. However, the logs themselves weighed a lot.

It must have taken a great prehistoric thinker to imagine two thin slices of log connected, at their centers by a string stick, this would roll along just as the logs did, yet be much lighter and easier to handle, thus the wheel and axle came into being and with them the first cart.

The wheel is important because ______ .

A．it was man' s first real invention

B．all transportation depends on it

C．every machine depends on it

D．both B and C

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第4题

People, in different parts of the world have very different ideas about what is good to ea

t. Even when people in different countries eat the same food, they often prepare it very differently. If you were in Germany, you would find soup that is thick and heavy. If you were in China, you would find soup that is thin and clear. On holidays most of us eat special foods. Year after year, even if many other things change, the food is always the same. Sometimes housewives begin weeks in advance to prepare the special foods that are traditionally served on certain holidays.

People in different parts of the world also have different ideas about what is good to drink. Among the most popular hot drinks are coffee and tea. Coffee is very popular in northern Europe and in the Middle East. Some people put cream and sugar in their coffee. But in the United States, many people drink their coffee "black" that is without cream or sugar. Tea is the national drink in China, Japan, and other Oriental(东方的) countries. In the Orient, people drink tea without sugar. But in England where it is also a national drink, many people use both sugar and hot or cold milk in their tea.

People in different parts of the world______.

A．cook the same food in different ways

B．like the same kinds of food

C．have the same ideas about foods

D．know how to prepare the same food

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第5题

Information technologists have dreamt for decades of making an electronic display that is

as good as paper: cheap enough to be pasted on to wails and billboards, clear enough to be read in broad daylight, and thin and flexible enough to be bound as hundreds of flippable leaves to make a book. Over the past few years they have got close. In particular, they have worked out how to produce the display itself, by sandwiching tiny spheres that change colour in response to an electric charge inside thin sheets of flexible, transparent plastic. What they have not yet found is a way to mass-produce flexible electronic circuitry with which to create that charge. But a paper just published in the Proceedings of the National Academy of Sciences suggests that this, too, may be done soon.

The process described by John Rogers and his colleagues from Bell Laboratories, an arm of Lucent Technologies, in New Jersey, and E Ink Corporation, in Cambridge, Massachusetts, starts with E Ink's established half-way house towards true electronic paper. This is based on spheres containing black, liquid dye and particles of white, solid pigment. The pigment particles are negatively charged, so they can be pushed and pulled around by electrodes located above and below the sheet.

The electrodes, in turn, are controlled by transistors under the sheet. Each transistor manipulates a single picture element (pixel), making it black or white. The pattern of pixels, in turn, makes up the picture or text on the page. The problem lies in making the transistors and connections. Established ways of doing this, such as photolithography, use silicon as the semiconductor in the transistors. That is all right for applications suck as pesters. It is too fragile and too expensive, though, for genuine electronic paper—which is why cheap and flexible electronic components are needed.

For flexibility, Dr. Rogers and his colleagues chose pentacene as their semiconductor, and gold as their wiring. Pentacene is a polymer whose semiconducting properties were discovered only recently. Gold is the most malleable metal known, and one of the best electrical conductors. Although it is pricey, so little is needed that the cost per article is tiny.

To make their electronic paper the researchers started with a thin sheet of Mylar, a tough plastic, that was coated with indium-tin oxide (ITO), a transparent electrical conductor. To carve this conductor into a suitable electric circuit, they used an innovation called microcontact printing lithography. This trick involves printing the pattern of the circuit on to the ITO using a rubber stamp. The "ink" in the process is a solvent-resistant chemical that protects this part of the ITO while allowing the rest to be dissolved.

From the first paragraph of the passage, we can learn that an electronic display ______.

A．can be made as good as paper

B．is cheap enough to be pasted on to walls and billboards

C．will be as thin and flexible as paper

D．is difficult to be created in the form. of flexible electronic circuitry

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第6题

The making of glass is a very old industry--at least 4,500 years old. Glass has many extra

ordinary qualities and it is frequently being used in new ways.

One of the most interesting new uses for glass is in telephone communication. Scientists have developed glass fibers as thin as human hair, which are designed to can-y light signals. When the light reaches the other end, it is first changed into electrical signals, which are in turn converted into sound messages.

Called light wave communication, the new system was used successfully in an experiment in Chicago in 1997. During the experiment, two glass fibers were able to carry 672 conversations at the same time. The lightwave cable, containing 144 glass fibers, has the capacity to carry 50,000 conversations at the same time.

The lightwave communication system has two important advantages. First, the glass fiber cables are smaller and weigh less than copper. Second, they cost less.

Perhaps it can be said that telephone communication has entered the age of light.

One of the extraordinary qualities of glass is that it can carry ______.

A．sound signals

B．light signals

C．electrical signals

D．any signals

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第7题

Our environment is getting worse and worse with the increase of the world population, whic

h affects the environment in two ways. Firstly, the limited energy resources will be used up much faster. Secondly, the increasing population creates more pollution, another severe problem that needs to be solved: Both problems are long-term ones because actions taken now show their results slowly over many years. They are also urgent because delays in action can lead to great suffering and social problems. The question seems to be difficult to handle for most people. However, a person can be a protector of environment in everyday life if he takes actions to save the environment right now. With the development of technology, cars make transportation easier and quicker than before, but we can't ignore the disadvantages brought to us by more and more cars in use. For example, we are consuming gasoline(汽油), which is a non-renewable (无法更新的)resource, and will soon be gone. Moreover, the exhausted gas from cars pollutes our air, and our health is therefore threatened by air pollution, which has a big potential effect on our daily life. So we can consider walking, taking buses, carpooling(合用汽车) instead of driving cars alone. This seems to be a very slow process that can't be so effective if it's taken by a single person. But when more and more people become aware of the importance and positively take it as their personal responsibilities, the condition of the air will be improved to a great extent.

According to the writer, the main problem to our environment today is______.

A．the increase of population

B．the limited energy resources

C．the more serious air pollution

D．the development of technology

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第8题

A．sensibleB．criticalC．emergentD．urgent

A.sensible

B.critical

C.emergent

D.urgent