According to the first two paragraphs,________.
A: the use of water is a completely new concept
B: the sea has long been used as a way of power
C: water is a source of energy far more economical than any other energies
D: water, if properly handled, may present a promising solution to energy crisis
A: the use of water is a completely new concept
B: the sea has long been used as a way of power
C: water is a source of energy far more economical than any other energies
D: water, if properly handled, may present a promising solution to energy crisis
举一反三
- The use of water referred in this passage is ______. A: a new concept compared with other ways of natural resources B: less expensive than petroleum and other means of energies C: now being used more from the ocean than from rivers and lakes D: being developed to supplement other sources of energy
- 单选题 ( 2.0 分 )<br/>Which of the following statements is true according to the<br/>passage? A: Nuclear power is a safe and reliable energy source. B: solar energy is always available as a source of energy. C: Water and steam energy has been successfully used in some<br/>countries. D: The real solution to energy crisis lies in natural sources of<br/>energy.
- We can learn from the passage that________. A: as far as energy source is concerned, salt water is useless because of its chemical properties B: the working principle of an vibrating water column is to use water as a direct power driving a generator C: Britain is pursuing a method that the Japanese have already put into practice D: Britain is the most advanced country in developing new energy source
- Water wheels are machines that use the energy of ______ to turn a wheel. The axle of the turning wheel can then power other machines to do work.
- What other changes were they trying to make in addition to becoming more economical with power and water usage