Hydraulic systems are widely used in modern aircraft only in recent years.
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举一反三
- ______ is mainly used in light aircraft and only used for emergency on many large aircraft, and its operation medium is ______. A: starting system, oil B: hydraulic system, compressed air C: elevator, hydraulic fluid D: pneumatic system, compressed air
- In recent times, machines are (smart) __________ than they used to be years ago.
- 83. The only cylindrical chart projection widely used for navigation is the _____.
- In<br/>recent times, machines are ______ than they used to be years ago. (smart)
- The use of abbreviation is______ . A: a reflection of modern life in language B: widely used because of the quickened pace of modern life C: commonly used in the United States D: adopted according to the modern way of thinking
内容
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______ is mainly used in light aircraft, and also be used for emergency on many large aircraft. A: Starting system B: Hydraulic system C: Anti-ice and deicing system D: Pneumatic system
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Only in recent years have tools been available for investigating nuclei in any detail.
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In only 30 years,the small fishing village has been_ into a modern city.
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English was and still is the only Lingua Franca because it is widely used by people all of the world.
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People have become used to high rates of inflation in recent years.（） A: Right B: Wrong C: Not Mentioned