[单项选择]Techniques to harness the energy of the sun are being developed.
A. convert
B. store
C. utilize
D. receive

[单项选择]Techniques to harness the energy of the sun are being developed.
A. convert
B. store
C. utilize
D. receive

[单项选择]

Passage 5
The energy which the sun radiates goes in every direction, and only a minute part of it falls on the earth. Even so, it represents power of about 5,000,000 horsepower (马力)per square mile per day; the sun gives us as much energy every minute as mankind utilizes in a year. At present, we use this energy in directly, and it is our final source of power. Coal represents the chemical action of the sun on green plants thousands of years ago. Water power results from the rain formed by vapor which comes from the evaporation of power. Coal represents the rain formed by vapor which comes from the evaporation of water under the sunshine. Even windmills operate because of air currents set in motion by the different heating affects of the sun in different places. Some day, through chemistry or some type of solar engine, we shall harness this great source of energy more directly. Already a scientist has worked out an engine, surprisingly efficient, in with the sun&rsq
A. only a very small part is available
B. the sun is too distant from the earth
C. it takes thousands of years for this energy to be stored up in coal and oil
D. our scientific knowledge is not sufficient

[单项选择]The natural forms of energy are the sun, the wind, the sea ______ heat from the center of the earth.


A. as well as
B. as well
C. so well as
D. so well

[单项选择]The energy gained-from the sun can then be used during the night to enable the necessary chemical reactions to ______ in his body.


A. precede
B. proceed
C. progress
D. practice

[简答题]renewable sources of energy

[单项选择]Traditional structured analysis techniques focus upon the flow of (36) within a system. Object-oriented analysis emphasizes the building of real-world models. It examines requirements from the perspective of the classes and objects found in the vocabulary of the (37) domain.
Traditional system design method emphasizes the proper and effective structure of a complex system. Object-oriented design method encompasses the process of object-oriented decomposition and a (38) for depicting both logical and physical as well as static and dynamic models of the system under design.
Object-oriented programming is a method of implementation in which programs are organized as cooperative collections of objects, each of which represents an (39) of some class, and whose classes are all members of a hierarchy of classes united via (40) relationships.

A. control
B. program
C. data
D. reference

[单项选择]（）involves using mathematical techniques to forecast future outcomes based on historical results.
A. Trend analysis
B. Quality audit
C. Defect repair review
D. Flowcharting

[单项选择]His production techniques are elaborate and near legendary, but even if they could be ______, it wouldn't be the same for any other people.
A. resembled
B. approximated
C. duplicated
D. undertaken

[单项选择]

All the following tools and techniques are helpful to accurately confirming customers'needs,except（）

A. questionnaires
B. prototyping approaches
C. fishbone diagrams
D. interviews