7.But what if none of them contain the ----- that you need?

A . prefix-list， route-map， filter-list， distribute list B . route-map， filter-list， prefix-list， distribute-list C . route-map， distribute-list， prefix-list， filter-list D . filter-list， prefix list， route-map， distribute list E . distribute list， prefix-list， route-map， fitter list

A . Incorrect distribute lists have been configured B . Missing ip classless command C . CEF not enabled D . No default metric configured for EIGRP

A . incorrect distribute lists have been configured B . missing ip classless command C . CEF not enabled D . no default metric configured for EIGRP

A、message B、theory C、version

A . The retention policy is cleared. B . RMAN does not consider any backup as obsolete. C . The retention policy is set to its default setting of redundancy 1. D . The retention policy is set to its default setting of recovery window 7.

M: To tell you the truth, I don't think much of them. Q: What does the man feel about the situation comedies？ (15) A．He doesn't think about them. B．He likes them very much. C．He thinks they arc not as good as many people expected. D．He doesn't like them.

A．not all B．no one C．not everyone D．not every one

A、life B、love C、nature D、the mindset and perpective of human beings E、death 此题为多项选择题。

More than 40 years passed before physicists were able to offer an explanation for superconductivity. The accepted theory, developed in the 1950s, holds that the fundamental behavior. of electrons changes at very low temperatures because of the effects of quantum mechanics. Electrons are tiny particles that make up the outer part of an atom, circling rapidly around the nucleus of the atom. In a regular conductor—a metal that conducts an electric current—the outermost electrons are not bound tightly to the atoms, and so they move around relatively freely. The flow of these electrons is an electric current. At normal temperatures, a conductor's electrons cannot move completely freely through the metal because they are "bumped around" by the metal's atoms. But according to the leading theory of superconductivity, when a metal is very cold, electrons form. pairs. Then, like couples maneuvering on a crowded dance floor but never colliding, the paired electrons are able to move unimpeded through the metal. In pairing up, it seems, the electrons are able to "blend together" and move in unison without resistance. This explanation seems to account for superconductivity at extremely low temperatures, but in 1986 scientists in Switzerland found that some metal-containing ceramics are superconductors at much higher temperatures. By 1992, scientists had developed ceramics that become superconducting at - 297'F, and some researchers speculated that room-temperature superconductors may be possible. Scientists are still trying to formulate a theory for high-temperature superconductivity. The new ceramic materials can be maintained at their superconducting temperatures, with relatively inexpensive liquid nitrogen rather than the much colder and much more costly liquid helium required by metal superconductors. The cost difference could make superconductivity practical for many new technologies. For example, magnetically levitated trains, which require superconducting electromagnets, would be much cheaper to build than they are now. Superconducting devices might also be used for advanced power transmission lines and in new types of compact, ultrafast computers. But for the time being, superconductivity is finding application mostly in scientific research and in some kinds of medical imaging devices. The flow of an electric current in a regular conductor is made possible by the fact that______. A．electrons circle rapidly around the atom B．the outermost electron move relatively freely around the atom C．the innermost electrons stick to the atom D．the outermost electrons are bound tightly to the inner ones

On the face of it, it looks as though Mr. Phillips is right. Only 27% of Afro-Caribbean boys get five A-C grades at GCSE, the exams taken by 16-year-olds, compared with 47% of boys as a Whole and 44% of Afro-Caribbean girls. Since, in some subjects, candidates who score less than 50% get Cs, those who don't reach this threshold have picked up pretty little at school. Mr. Phillips's suggestion that black boys should be taught separately implies that ethnicity and gender explain their underachievement. Certainly, maleness seems to be a disadvantage at school. That's true for all ethnic groups: 57% of girls as a whole get five A-Cs, compared with 47% of boys. But it's not so clear that blackness is at the root of the problem. Among children as a whole, Afro-Caribbeans do indeed perform. badly. But Afro Caribbeans tend to be poor. So to get a better idea of whether race, rather than poverty, is the problem, one must control for economic status. The only way to do that, given the limits of British educational statistics, is to separate out the exam results of children who get free school meals: only the poor get free grub. Poor children's results tell a rather different story. Afro-Caribbeans still do remark ably badly, but whites are at the bottom of the pile. All ethnic minority groups do better than them. Even Bangladeshis, a pretty deprived lot, do twice as well as the natives in their exams; Indians do better still. And absolute numbers of underperforming whites dwarf those of underperforming Afro-Caribbeans: last year, 131,393 of white boys failed to hit the government's benchmark, compared with 3,151 Afro-Caribbean boys. These figures suggest that, at school at least, black people's problem is not so much race as poverty. And they undermine the idea of teaching black boys separately, for if poor whites are doing worse than poor blacks, there's not much argument for singling out blacks for special measures: whites need help just as badly. According to the text, the public response to Mr. Philips' claim is A．a nervous impression. B．a mixed reception. C．a particular performance. D．a critical comment.

A．12 B．10 C．8 D．6 E．1

Another source of knowledge is the vast store of traditional practices handed down from father to son, or mother to daughter, of old country customs, of folklore (风俗). All this is very difficult for a college student to examine, for much knowledge and personal experience is needed here to separate good plants from wild grass. The college students should learn to realize and remember how much of real value science has found in this wide and confused wilderness and how long scientific discoveries of what had existed in this area long. In the last paragraph the phrase "this wide and confused wilderness" refers to ______. A．personal experience B．wild weeds among good plants C．the information from the parents D．the vast store of traditional practices

Although U.S. hospitals provide outstanding research and frequently excellent care, they also exhibit the classic attributes of insufficient organizations: increasing costs and decreasing use. The average cost of a hospital stay in 1987—$3,850—was more than double the 1980 cost. A careful government analysis published in 1987 revealed the inflation of hospital costs, over and above general price inflation, as a major factor in their growth, even after allowances were made for increases in the population and in intensity of care. While the rate of increase for hospital costs was 2796 greater than that for all medical care and 163% greater than that for all other goods and services, demand for hospital services fell by 34%. But hospitals seemed oblivious of the decline: during this period the number of hospital beds shrank only by about 396, and the number of full-time employees grew by more than 240,000. After yet another unexpectedly high hospital-cost increase last year, one puzzled government analyst asked: "Where's the money going？" Much of the increase in hospital costs—amounting to $180 billion from 1965 to 1987—went to duplicating medical technology available in nearby hospitals and maintaining excess beds. Modern Healthcare, a leading journal in the field, recently noted that "anecdotes of hospitals' unnecessary spending on technology abound". Medical technology is very expensive. An operating room outfitted to perform. open-heart surgery costs hundreds of thousands of dollars. From 1982 to 1989 the number of hospitals with open-heart-surgery facilities grew by 33%, and the most rapid growth occurred among smaller and moderate-sized hospitals. This growth was worrisome for reasons of both costs and quality. Underused technology almost inevitably decreases quality of care. In medicine, as in everything else, practice makes perfect. For example, most of the hospitals with the lowest mortality rates for coronary-bypass surgery perform. at least fifty to a hundred such procedures annually, and in some cases many more; the majority of those with the highest mortality rates perform. fewer than fifty a year. According to the passage, the American health-care system______. A．is working smoothly B．is the best system in the world C．is not working efficiently D．in on the point of collapses

A、Reasoning by principle. B、Reasoning by definition. C、Reasoning by analogy. D、Reasoning by generalization.