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Which one is the proof showing that dolphins are breaking the family group？
A．They attack people.
B．The fight among themselves.
C．They mate with their family members.
D．They are rude and cruel.
答案
更多“Which one is the proof showing that dolphins are breaking the family group？A．They attack p”相关的问题
第1题
Which of the following sentences about Timothy A.Pychyl is NOT true？
A．He is one of the Procrastination Research Group.
B．He is a psychologist.
C．He is a teacher in Carleton University in Ottawa.
D．He is the co author of the study.
第2题
One might expect that the vacuum would always be the state of the lowest possible energy for a given region of space. If an area is initially empty and a real panicle is put into it, the total energy, it seems, should be raised by at least the energy equivalent of the mass of the added panicle. A surprising result of some recent theoretical investigations is that this assumption is not invariably true. There are conditions under which the introduction of a real particle of finite mass into an empty region of space can reduce the total energy, If the reduction in energy is great enough, an electron and a positron will be instantly created. Under these conditions the electron and positron are not a result of vacuum fluctuations but are real particles, which exist indefinitely and can be detected. In other words, under these conditions the vacuum is an unstable state and can decay(衰减) into a state of lower energy; that is one in which real particles are created.
The necessary condition for the decay of the vacuum is the presence of an intense electric field. As a result of the decay of the vacuum, the space permeated by such a field can be said to obtain an electric charge, and it can be called a charged vacuum. The particles that materialize in space make the charged vacuum likely to be found in only one place: in the immediate vicinity of a super heavy atomic nucleus(原子核), one with about twice as many pro tons as the heaviest natural nuclei known. A nucleus that large cannot be stable, but it might be possible to assemble one next to a vacuum for long enough to observe the decay of the vacuum. Experiments attempting to achieve this are now under way.
Which of the following titles best describes the passage as a whole？
A．The Vacuum: Its Fluctuations and Decay.
B．The Vacuum: Its Creation and Instability.
C．The Vacuum: a State of Absence.
D．Particles that Materialize in the Vacuum.
第3题
【C1】
A．composes
B．consists
C．covers
D．constitutes
第4题
【C7】______many of the best 'serious' British writers manage to be popular as well as pro found, the vast【C8】______of the books could not be classified as 'serious' literature. Britain is the home of【C9】______might be called 'middlebrow' literature.(That is, mid-way between serious and popular fiction)Many British authors write novels【C10】______as 'romances' , one of the middlebrow types. The British publisher which sells more books than any other is Mills & Boon,【C11】______books are exclusively【C12】______this type.
Poetry at the end or the twentieth century is【C13】______popular in Britain after it stopped being the normal【C14】______of literary self-expression 200 years ago. Books for poetry sell【C15】______comparatively large numbers. Their sales are not【C16】______as large as sales of novels, but they are large【C17】______for a few small publishers to【C18】______entirely on publishing poetry. Many of these poems are not academics and they are【C19】______to non-specialists. Perhaps the 'pop' idiom and the easy【C20】______of sound recording have made more people comfortable with spoken verse.
【C1】
A．route
B．road
C．path
D．way
第5题
Which tripositive lanthanoid ion(s)is(are)most likely to react with chromium(II )chloride？ What products are expected？ Explain.
第6题
Which of the following foods can NOT help with stress？
A．Foods with healthy fat.
B．Dairy products.
C．Alcoholic and non-alcoholic drinks.
D．Foods rich in protein and vitamin B6.
第7题
Which of the following about the language software is true？
A．It is free of charge.
B．It helps programmers write programs.
C．It is a kind of infamous software.
D．It reaches the market at the time it promised.
第8题
Which of the following facts is best supported by the text？
A．There will be a number of problems in cities in the future.
B．The world population will stop growing in 2040.
C．Fifteen percent of the world population will be elderly people.
D．Kenya will have the biggest population in the world.
第9题
Which is a result of more accurate standards？
A．Larger and more complicated engineering projects.
B．Less use of nature.
C．Less ability to work with traditional materials.
D．Simpler tools for designing large projects.
第10题
Which of the following statements is tree？
A．In the late 1990s New York ranked third in production Of grapes in U.S..
B．Gropes from Long Island are the best for wine making in the U.S..
C．About one-third of potatoes in the world are produced in Long Island.
D．Farms in Long Island can produce chickens, ducks and turkeys.
第11题
Which is NOT the reason of reduction of the price at 5 percent？
[ A] The Japanese producer holds a large quantity of stores and can ' t sell them out.
[ B ] The Japanese have improved their production means.
[ C] They can turn out more products.
[D] They expect to go on dealing with the Irish in the coming year.
