Passage 3
Because of the energy crisis, scientists in the oil-consuming nations have become increasingly interested in the potential(潛在的) of solar energy. Some experts estimate that the present supply of fossil (化石) fuel will not last until the end of the twentieth century. The problem that solar energy researchers face is how to harness (利用) the sun’s energy effectively and inexpensively. One of the most popular methods currently being tested uses rooftop solar collectors and underground storage tanks. An advantage of a properly working system of this type is that it will not create any environmental pollution. Another advantage of using solar energy is that the cost of the fuel-the sun’s rays-is zero. When a solar heating system is working at maximum (的) efficiency, it can provide up to 80 percent of winter heating needs.
11. The main topic of this passage is __________.
○A. the shortage of fossil fuel
○B(yǎng). the problems that energy researchers face
○C. an environmental pollution problem
○D. an inexpensive energy source
12. One popular solar heating system makes use of __________.
○A. roof collectors and underground storage
○B(yǎng). fossil fuel conversion
○C. underground oil tanks
○D. water collection and evaporation
13. The cost of using the sun’s rays for heating is ___________.
○A. about the same as the cost of fossil fuels
○B(yǎng). several hundred dollars per year
○C. negligible compared with other energy sources
○D. determined by the severity of the winter
14. Which of the following describes an advantage of using solar energy?
○A. There is little or no environmental pollution.
○B(yǎng). A large percentage of fuel costs can be saved.
○C. Fossil fuels will become more plentiful.
○D. The oil-consuming nations will not have to import oil.
15. According to some experts, the supply of fossil fuel will not last _______.
○A. one more century
○B(yǎng). an indeterminable time
○C. until the end of this century
○D. indefinitely
Because of the energy crisis, scientists in the oil-consuming nations have become increasingly interested in the potential(潛在的) of solar energy. Some experts estimate that the present supply of fossil (化石) fuel will not last until the end of the twentieth century. The problem that solar energy researchers face is how to harness (利用) the sun’s energy effectively and inexpensively. One of the most popular methods currently being tested uses rooftop solar collectors and underground storage tanks. An advantage of a properly working system of this type is that it will not create any environmental pollution. Another advantage of using solar energy is that the cost of the fuel-the sun’s rays-is zero. When a solar heating system is working at maximum (的) efficiency, it can provide up to 80 percent of winter heating needs.
11. The main topic of this passage is __________.
○A. the shortage of fossil fuel
○B(yǎng). the problems that energy researchers face
○C. an environmental pollution problem
○D. an inexpensive energy source
12. One popular solar heating system makes use of __________.
○A. roof collectors and underground storage
○B(yǎng). fossil fuel conversion
○C. underground oil tanks
○D. water collection and evaporation
13. The cost of using the sun’s rays for heating is ___________.
○A. about the same as the cost of fossil fuels
○B(yǎng). several hundred dollars per year
○C. negligible compared with other energy sources
○D. determined by the severity of the winter
14. Which of the following describes an advantage of using solar energy?
○A. There is little or no environmental pollution.
○B(yǎng). A large percentage of fuel costs can be saved.
○C. Fossil fuels will become more plentiful.
○D. The oil-consuming nations will not have to import oil.
15. According to some experts, the supply of fossil fuel will not last _______.
○A. one more century
○B(yǎng). an indeterminable time
○C. until the end of this century
○D. indefinitely