更多"What is the energy source of this s"的相关试题:
[单项选择]According to Mr. Annan, what may be a source of problems facing the world
A. Imports from developing countries.
B. Private corporations a lack of attention to problems in Africa.
C. Imports from developed countries.
D. Changes associated with globalization.
[单项选择]What was burnt
A. The piece of paper
B. Mr. Brown
C. The boy
[单项选择]What are salicylates
A. Leaves and tree bark.
B. The chemical in aspirin.
C. Aspirin tablets.
D. A Greek doctor.
[单项选择]Electrical energy may be divided into two components ______ as positive and negative.
A. distinguished
B. specified
C. separated
D. indicated
[单项选择]Every chemical change either results from energy being used to produce the change, or causes energy to be ______ in some form.
A. given off
B. put out
C. set off .
D. used up
[单项选择]From the sentence "Energy Secretary Bill Richardson, whose department had ignored security at Los Alamos for years, was walking around in a daze. ", we know that_____.
A. Energy Secretary Bill Richardson was chiefly responsible for the case
B. Energy Secretary Bill Richardson was in a great angry
C. Energy Secretary Bill Richardson was losing his mind in dealing with the case
D. Energy Secretary Bill Richardson was defeated severely
[单项选择]Why are subterranean buildings good for energy conservation
[单项选择]What does a man do when he cannot get exactly what he wants
A. He buys a similar thing of the colour he wants.
B. He usually does not buy anything.
C. At least two of his requirements must be met before he buys.
D. So long as the style is right, he buys the thing.
[单项选择]The mechanical energy can be changed back into electrical energy by means of a generator．（）
A. 通过发电机这种途径可以将机械能转变为电能。
B. 利用发电机可以将机械能转变为电能。
C. 借助于发电机可以把机械能返回电能。
D. 使用发电机这个方法能将机器产生的能量还原成电。
[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]According to the article, the California energy commission has received 200 project applications in one month. If that rate continues, approximately how many applications will they receive his entire year
A. 2400
B. 1200
C. 200
D. 3600
[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]Since the energy crisis, these big cars have become a real liability. They cost too much to run.
A. lack of reliability
B. substitute
C. costly means of transport
D. disadvantage
[单项选择]According to the passage, energy is released in the Sun when ______.
A. helium atoms bind with each other
B. gamma radiation escapes from the spectrum
C. radiation is absorbed by helium
D. nuclei of hydrogen atoms collide
