The energy which the sun radiates goes
in every direction, and only a minute part of it falls on the earth. It is
reported that some scientists believe less than 1% of the solar energy fallen on
the earth has been used so far. Even so, it represents power of approximately 5,
000,000 horsepower per square mile per day; the sun gives us as much energy
every minute as mankind utilizes in a year. At present, because of the lack of
scientific knowledge, we use this energy indirectly, and it is our only final
source of power. Coal represents the chemical action of the sun on green plants
thousands of years ago. Waterpower results from the sun’s creating vapor and
subsequent rain. Even windmills operate because of air currents set in motion by
the different heating effects of the use this immense source of energy more
directly. Already, scientists have wo
A. tidy
B. sunny
C. tiny
D. heavy
更多"The energy which the sun radiates g"的相关试题:
[单项选择]
The energy which the sun radiates goes
in every direction, and only a minute part of it falls on the earth. It is
reported that some scientists believe less than 1% of the solar energy fallen on
the earth has been used so far. Even so, it represents power of approximately 5,
000,000 horsepower per square mile per day; the sun gives us as much energy
every minute as mankind utilizes in a year. At present, because of the lack of
scientific knowledge, we use this energy indirectly, and it is our only final
source of power. Coal represents the chemical action of the sun on green plants
thousands of years ago. Waterpower results from the sun’s creating vapor and
subsequent rain. Even windmills operate because of air currents set in motion by
the different heating effects of the use this immense source of energy more
directly. Already, scientists have wo
A. less than 1%
B. 5%
C. 50%
D. 100% but indirectly
[填空题]Apart from CO2, which traps the sun’s radiation, other greenhouse gases like ______are also involved in warming.
[填空题]Almost every new innovation goes through there phases. When initially
introducing into the market, the process of adoption is slow. The early 79. ______
models are expensive and hard to use, and perhaps even unsafe. The
economic impact is relatively great. 80. ______
The other phase is the explosive one, where the innovation is rapidly 81. ______
adopted by a large number of people. It gets cheaper and easier to use and
becomes something familiar. And then in the third stage, diffusion (传播，扩
散) of the innovation slows down again, as if it permeates out across the 82. ______
economy.
During the third phase, the whole new industries spring up to produce 83. ______
the new product or innovation, and to service it. For example, during the
1920s, there is a dramatic acceleration in auto production, from 1.9 million
[填空题]the direction in which the sun rises
[单项选择]Every couple who goes to the church believes that they will make that trip only once to their lives. They want the day to be perfect, and they are asking for much more than good weather. They want the most beautiful clothes, the freshest flowers. Moreover, her family who will foot the bill is not in any mood to (47)______ .
A quick look at any bride magazine will (48)______ that plenty of attractive goods and services (49)______ for a share of the wedding budget. Besides the obvious choices of rings, dresses, flowers, and photographs, there are the less apparent expenses: a lavish (奢华的) cake, a dinner, a reception, music for both the ceremony and the reception, tips, and even napkins (餐巾) and matchbooks printed with the couple’’s names and the wedding date.
As the arrangements are generally (50)______ , there are plenty of services that can be hired to help with the planning and execution of the every aspect of the wedding: planning the photographs, selecting the wedding rin
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