Read the passage and then choose the best answer.
The sun has produced energy for billions of years. Solar energy is the solar radiation that reaches the earth.
Solar energy can be converted directly or indirectly into other forms of energy, such as heat and electricity. The major drawbacks of solar energy are the discontinuous and variable manner in which it arrives at the earth's surface and, the large area required to collect it at a useful rate.
Solar energy is used for heating water for domestic use, space heating of buildings, drying agricultural products, and generating electrical energy. In the 1830s, the British astronomer John Herschel used a solar collector box to cook food during an expedition to Africa. Now, people are trying to use the sun's energy for lots of things.
Electric utilities are trying photovoltaic, a process by which solar energy is converted directly to electricity. Electricity can be produced directly from solar energy using special devices or indirectly from steam generators using solar heat collectors to heat up a working fluid.
Out of the 14 known solar electric generating units operating in the US at the end of 2004, 10 of these are in California, and 4 in Arizona. No statistics are being collected on solar plants that produce less than 1 megawatt of electricity, so there may be smaller solar plants in a number of other states.
0Câu 36
How can solar energy be converted?
A. It can hardly be converted because there are too many difficulties.
B.It can be converted both directly and indirectly.
C. It can be converted directly.
D. It can be converted indirectly.
Câu 37
What are the difficulties of using solar energy?
A. It needs large space to collect the energy at a useful rate.
B.The way the sun radiation reaches the earth surface is various and irregular.
C.
D. Large space for energy collecting at a useful rate is required and the way of the sun reaching the earth surface is unpredictable.
Câu 38
What is NOT mentioned about the use of solar energy?
A. It is used for drying clothes.
B.It is used for drying agricultural products.
C. It is used for heating space in buildings.
D. It is used for cooking.
Câu 39
In the first sentence of the last paragraph, 10 out of 14 known solar electric generating units are in California means:
A. Among 14 solar electric generating units from California, 10 are known.
B.Among 14 known solar electric generating units, 10 units are from California.
C. 10 known solar electric generating units are from California, 14 others are not.
D. 14 known solar electric generating units are from California, 10 others are not.
Câu 40
The astronomer (paragraph 3) is the person who _____.
A. studies the UFOs
B.
C. studies countries
D. studies the earth geography
A.
B.
C.
D.
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