s="" geologic="" features.="" with="" the="" development="" of="" optomechanical="" scanner,="" scientists="" began="" to="" construct="" digital="" multispectral="" images="" using="" data="" beyond="" sensitivity="" range="" visible="" light="" photography.="" these="" are="" constructed="" by="" mechanically="" aligning="" pictorial="" representations="" such="" phenomena="" as="" reflection="" waves="" outside="" spectrum:="" refraction="" radio="" waves,="" and="" daily="" changes="" in="" temperature="" areas="" on="" earth's="" surface.="" imaging="" has="" now="" become="" basic="" tool="" remote="" sensing="" from="" satellites. The advantage of digital over photographic imaging is evident: the resulting numerical data are precisely known, and digital data are not subject to the vagaries of difficult-to-control chemical processing with digital processing, it is possible to combine a large number of spectral images. The acquisition of the first multispectral digital data set from, the multispectral scanner (MSS) aboard the satellite Landsat in 1972 consequently attracted the attention of the entire geologic community. Landsat MSS data are now being applied to a variety of geologic problems that are difficult to solve by conventional methods alone. These include specific problems in mineral and energy resource exploration and the charting of glaciers and shallow seas. A more fundamental application of remote sensing is to augment conventional methods for geologic mapping of large areas. Regional maps present compositional structural and chronological information for reconstructing geologic revolution. Such reconstructions have important practical applications because the conditions under which rock units and other structural features are formed influence the occurrence of ore and petroleum deposits and affect the thickness and integrity of the geologic media in which the deposits are found. Geologic maps incorporate a large, varied body of specific field and laboratory measurements, but the maps must be interpretative because field measurements are always limited by rock exposure, accessibility and labor resources. With remote-sensing techniques, it is possible to obtain much geologic information more efficiently than it can be obtained on the ground. These techniques also facilitate overall interpretation. Since detailed geologic mapping is generally conducted in small areas, the continuity of regional features that had intermittent and variable expressions is often not recognized, but in the comprehensive views of Landsat images these continuities are apparent. However, some critical information cannot be obtained through remote sensing, and several characteristics of the Landsat MSS impose limitations on the acquisition of diagnostic data. Some of these limitations can be overcome by designing satellite systems especially for geologic purposes; but to be most effective, remote sensing data must still be combined with data from field surveys, laboratory tests, and the techniques of the earlier twentieth century.
1.Which of the following can be measured by the optomechanical scanner but not by visible light photograph?
2.Lands images differ from conventional geologic maps in that the former（ ） .3.The passage provides information about all of the following topics except （ ）.4.What does the author mention about “the conventional methods”？5.According to the author（ ） .'>
The term "remote sensing" refers to the techniques of measurement and interpretation of phenomena from a distance. Prior to the mid-1960s the interpretation of film images was the primary means for remote sensing of the earth's geologic features. With the development of the optomechanical scanner, scientists began to construct digital multispectral images using data beyond the sensitivity range of visible light photography. These images are constructed by mechanically aligning pictorial representations of such phenomena as the reflection of light waves outside th
Some people （ ）avoid questions of right and wrong or remain neutral about them.
A.violently B.enthusiastically C.sincerely D.deliberately
If we （ ）our relations with that country, we’ll have to find another supplier of rawmaterials.
A.diffuse B.diminish C.terminate D.preclude
These instruments, which break up structures only to examine them more fully, demonstrate how details can be（ ） and separated from the whole.
A.amplified B.magnified C.exemplified D.signified
Ideas about education are changing in the United States. Education today is not just a high school diploma or a college degree. Many adults are not interested in going to college. They are interested in other kinds of learning. For them, learning does not end with a diploma.Continuing education gives these adults the opportunity to increase their knowledge about their own field or to learn about a new field. It also gives them a chance to improve their old skills or to learn new ones.Secretaries, mechanics, and barbers can take classes to improve their work skills. Nurses can take classes to increase their knowledge of nursing. If they know more or learn more, then they can get a better job or earn more money.Continuing education classes give some adults the chance to learn new skills. There is usually a large variety of classes to choose from, typing, foreign cooking, photography, auto repair, furniture repair, or swimming. These are only some of the classes available.Some adults take classes for fun or because the class will be useful for them. For example, they can choose a class in almost any language, Chinese, Spanish or English as a second language. There are classes in first aid or classes in sewing. There are also many other types of classes to choose from.Other adults take continuing education classes to improve their own lives because they want to feel better about themselves. Overweight people can find exercise classes or classes in nutrition. Others can learn how to be good parents, or how to get along with other people. There are many opportunities for adults to continue their learning. Almost any community college or public school system has a continuing education program. There are classes in schools, community buildings, or churches. Most classes are in the evening, so working people can attend. The classes are usually small, and they are inexpensive.Thousands of people register for continuing education classes each year. They receive no diploma or certificate, and no grade for most of the classes they attend. For them, learning is something they do because they want to.1.Lots of people attend continuing education classes because（ ） .2.Some adults take lessons of typing or auto repair to （ ）.3.What’s the main idea of Para.7?4.Attending continuing education classes（ ） .5.We can learn from the passage that（ ） .
A.they can also go to church at the same time B.there are many courses they can choose from C.learning is something they are interested in D.the classes will help them become more confident
A.get a college education B.learn new skills C.get a certificate D.earn grades
A.Adults can continue their learning. B.Classes are held for working people. C.Most continuing education classes are in the evening. D.Adults have many opportunities to continue their learning.
A.is expensive B.requires a loan C.is free of charge D.does not cost much money
A.adult education is very popular B.college education is not important C.others kinds of learning are more important than school learning D.continuing education classes teach the same courses that are taught in colleges