Read the following passage và mark the letter A, B, C or D on your answer sheet khổng lồ indicate the correct answer khổng lồ each of the questions.
Bạn đang xem: The search for alternative sources of energy has led in various directions
The tìm kiếm for alternative sources of energy has led in various directions. Many communities are burning garbage and other biological waste products khổng lồ produce electricity. Converting waste products khổng lồ gases or oil is also an efficient way to lớn dispose of waste.
Experimental work is being done to derive synthetic fuels from coal, oil shale & coal tars. But to lớn date, that process has proven expensive. Other experiments are underway khổng lồ harness - power with giant windmills. Geothermal power, heat from the earth, is also being tested.
Some experts expect utility companies to lớn revive hydroelectric power derived from streams và rivers. Fifty years ago hydroelectric power nguồn provided one third of the electricity used in the United States, but today it supplies only four percent. The oceans are another potential source of energy. Scientists are studying ways to convert the energy of ocean currents, tides, & waves khổng lồ electricity. Experiments are also underway lớn make use of the temperature differences in ocean water to produce energy.
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Bước 3: Điền mã cùng Kích hoạt
A. Efficient Ways of Disposing of Waste
B. The Use of Water Productions for Energy
C. The search for Alternative Sources of Energy
D. New Discoveries in Geothermal nguồn
Câu 2. In the second paragraph, the phrase “synthetic fuels” could best be replaced by which of the following?
Câu 4. According khổng lồ the author, the impracticability of using coal, oil shale & coal tars as sources of energy is due to ___________ .
A. their being time consuming
B. their being money consuming
C. the scarcity of sources
D. the lack of technology their being money consuming
A. Hydroelectric nguồn will be the main source of energy
B. Synthetic fuels will be the principal source of alternative energy
C. Alternative energy will come from a variety of sources
Xem thêm: Giải Phương Trình Căn Bậc 2, Giải Phương Trình Chứa Căn Bậc 2
All alterenative production of energy will be delivered from water.
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