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Tidal energy is renewable plentiful and clean -Wind will be used as an environmental friendly sources of energy . -There are many ways will be used to solve the problem of pollution
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-Tidal energy is renewable ...plentiful......... and clean (plenty)
-Wind will be used as an ......enviromentally......... friendly sources of energy . (environment)
-There are many ways will be used to solve the problem of ....pollution...... (pollute)
-.......unfortunately....... , fossil fuels are harmful to the environment (fortunate)
-We should use them ....economic.......... and try to find out alternative sources of power . (economy)
-I think that solar energy can be an ...alternative.......... source of energy in the near future (alter)
-It's a clean source of energy . Sailboats couldn't move without this ......power....... (powerful)
-Limit car trips by relying on biking , walking public ..transportation........... (transport)
-Energy is used to ....produce........ a lot electrical thing (product )
-I don't think so . The solar penels are becoming .....uncheap....... and easy to install (cheap)
The 'Law of conservation of energy’ is a law of science that states that energy cannot be created or (25) DESTROYED, but only changed from one form into another or transferred from one object to another.
Everyday examples:
1. Water can produce electricity. Water falls from the sky and spins the turbine of a generator to produce electricity. In this process, the (26) POTENTIAL energy of water in a dam can be turned into (27) KINETIC energy which can then become (28) ELECTRIC energy.
2. When the car hit the road sign, the sign fell over. The energy was (29) TRANSFERRED from the moving car to the stationary sign, causing the sign to move. No energy was lost in the transfer.
Đáp án: B
Giải thích: cấu trúc a number of + Ns: nhiều, một số lượng lớn
Dịch: Đó là lý do tại sao một số lượng lớn các ngành công nghiệp ủng hộ các chương trình mà họ có thể nhận được nhiều các vật liệu có thể tái chế thành sản phẩm mới.
The search (26) for alternative sources of energy has led in various directions. Many communi- ties are burning garbage (27) and other biological waste products to produce electricity. Converting waste products to gases or oil (28) is also an efficient way to dispose of waste.
Experimental work is being done to derive synthetic fuels (29) from coal, oil, shale and coal tars. However that process (30) has proved to be expensive. Other experiments that are underway to harness power with giant windmills are also (31) being tested.
Some experts expect utility companies to receive hydroelectric power (32) derived from streams and rivers. Fifty years (33) ago hydroelectric power provided one third of the electricity used in the United States, but today it supplies only four percent. The oceans are another potential sources of energy. Scientists are studying ways to convert the energy of ocean currents, tides and waves (34) to electricity. Experiments are also underway to make use (35) of temperature differences in ocean water to produce energy.