Until only recently did hydroelectric power was universally considered as an environmentally safe and clean means of electricity generator.
对
举一反三
- Electricity generated from hydroelectric dams and wind power is more _______ than fossil fuel generated power.
- Hydroelectric power plants generate in a much cleaner way than coal-fired ones. A: electric B: electricity C: electronic D: economic
- My parents are greatly concerned about my ____________ (safe). Not until I got home ___________ (safe) did they feel ____________(relieve).
- Not until recently did people in our village begin to know something about Internet.
- 9% of the world's electricity supply is provided by hydroelectric power.
内容
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The phrase “power cuts" in the second paragraph means ( ) A: the failure to give orders B: the stop of the supply of electricity C: the increase in the use of electricity D: the cut in the number of visitors
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Not until recently did I（）the college life. A: A.use to B: B.get used to C: C.used to D: D.used in
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If the battery is short of electricity, the engine and generator recharge the battery．
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not until recently
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Maglev trains have many advantages. They are fast, safe, and environmentally friendly.