单选题A thorough study of biology requires ______ with the properties of trees and plants, and the habit of birds and beasts. A. acquisition B. discrimination C. curiosity D. familiarity

单选题At first I guessed it was an airplane, but I soon changed my mind because it remained {{U}}static{{/U}} instead of moving like a plane.

单选题In applied investigation, ______.

单选题{{B}}Passage Six{{/B}} Although solutions to a problem are often the. fruit of direct investments in targeted research, the most revolutionary solutions tend to emerge from cross-pollination with other disciplines. Medical investigators might never have known of X rays, since they do not naturally occur in biological systems. It took a physicist, Wilhelm Conrad Rontgen, to discover them--light rays that could probe the body's interior with nary a cut from a surgeon. Here's a more recent example of cross-pollination. Soon after the Hubble Space Telescope was launched in April 1990, NASA engineers realized that the telescope's primary mirror--which gathers and reflects the light from celestial objects into its cameras and spectrographs-had been ground to an incorrect shape. In other words, the billion-and-a-half-dollar telescope was producing fuzzy images. As if to make lemonade out of lemons, though, computer algorithms came to the rescue. Investigators developed a range of clever and innovative image-processing techniques to compensate for some of Hubble's shortcomings. Tums out, maximizing the amount of information that could be extracted from a blurry astronomical image is technically identical to maximizing the amount of information that can be extracted from a mammogram. Soon the new techniques came into common use for detecting early signs of breast cancer. In 1997, for Hubble's second servicing mission, shuttle astronauts swapped in a brand-new, high-resolution digital detector-designed to the demanding specs of astronomers whose careers are based on being able to see small, dim things in the cosmos. That technology is now incorporated in a minimally invasive, low-cost system for doing breast biopsies, the next stage after mammograms in the early diagnosis of cancer. Today, cross-pollination between science and society comes about when you have ample funding for ambitious, long-term projects. America has profited immensely from a generation of scientists and engineers who, instead of becoming lawyers or investment bankers, responded to a challenging vision posed in 1961 by President John F. Kennedy. "We intend to land a man on the Moon," proclaimed Kennedy, welcoming the citizenry to aid in the effort. That generation, and the one that followed, was the same generation of technologists who invented the personal computer. Bill Gates, co-founder of Microsoft, was thirteen years old when the U. S. landed an astronaut on the Moon; Steve Jobs, co-founder of Apple Computer, was fourteen. The PC did not arise from the mind of a banker or artist or professional athlete. It was invented and developed by a technically trained workforce, who had responded to the dream unfurled before them, and were thrilled to become scientists and engineers.

单选题The very biggest and most murderous wars during the industrial age were intra industrial-wars that______Second Wave nations like Germany and Britain against one another. A. pitted B. drove C. kept D. embarked

单选题Young women from every state ______ for the title of Miss America.

单选题Mary and John took a long time in saying good night in order to postpone the ______ of parting. A. jealousy B. relief C. anguish D. appreciation

单选题Despite almost universal __________ of the vital importance of women’s literacy, education remains a dream for many women in far too many countries of the world.

单选题Why are Democrats and some Republicans concerned that the project will erode civil Liberties?

单选题The town planning commission said that their financial outlook for the next year was optimistic. They expect increased tax [A] efficiency [B] revenues [C] privileges [D] validity

单选题Where in our brain do we ______ meanings to words?

单选题Nobody in the company pays attention to his opinion, because what he has said is always mere______ A. commonplace B. common C. ordinary D. homely

单选题According to the passage, living science is impossible with, out widespread belief in the existence of

单选题The old man______the events of the time in accordance with his peculiar ideas.

单选题The changes in globally averaged temperature that have occurred at the Earth"s surface over the past century are similar in size and timing to those 21 by models that take into account the combined influences of human factors and solar variability. To 22 the question of attribution requires the 23 of more powerful and complex methods, beyond the use of global averages alone. New studies have focused on 24 maps or patterns of temperature change in 25 and in models. Pattern analysis is the climatologically equivalent of the more comprehensive tests in the medical analogy mentioned 26 , and makes it possible to achieve more definitive 27 of observed climate changes to a particular cause or causes. The expected influence of human activities is thought to be much more complex than uniform warming over the entire surface of the Earth and over the whole 28 cycle. Patterns of change over space and time therefore provide a more powerful 29 technique. The basic idea 30 pattern-based approaches is that different 31 causes of climate change have different characteristic patterns of climate response or fingerprints. Attribution studies seek to 32 a fingerprint match between the patterns of climate change 33 by models and those actually observed. The most recent assessment of the science suggests that human activities have led to a discernible 34 on global climate and that these activities will have and increasing influence on future climate. The burning of coal, oil and natural gas, as well as various agricultural and industrial practices, are 35 the composition of the atmosphere and contributing to climate change, These human activities have led to increased atmospheric 36 of a number of greenhouse gases, including carbon dioxide, methane and so on in the lower atmosphere. Human activities, such as the burning of fossil, have also increased the 37 of small particles in the atmosphere. These particles can change the 38 of energy that is absorbed and reflected by the atmosphere. They are also believed to modify the 39 of air and clouds, changing the amount of energy that they absorb and reflect. Intensive studies of the climatic effects of these particles began only recently and the overall 40 is uncertain. It is likely that the net effect of these small particles is to cool the climate and to partially offset the warming of increasing concentrations of greenhouse gases.

单选题What is the main idea of the third paragraph?

单选题The oil price rise reactivated the boom in commodity prices and ______ inflation, which reached an annual rate of 15 per cent in the spring of 1974.