In the future，people may travel to Mars by water-powered spaceship!Today's spaceships are fine for getting things into space，but they are not so good at travelling long distances.These spaceships burn chemical fuels （燃料） and they are very expensive.Scientists say that a water-powered spaceship could make the trip to Mars much cheaper.The idea is just in the planning stages（階段） now，but scientists think such a spaceship could be developed soon.The key to the water-powered spaceship is the engine （發(fā)動機）.Regular engines push spaceships by burning fuel.The water engine will use steam，created by solar panels （太陽能板） that heat water to a high temperature.Of course，the spaceship will have to carry a lot of water for the long trip to Mars.
Today's spaceships could not carry that much water.But scientists think that a spaceship blown up like a balloon （氣球）will be able to.
One US company has already developed a spaceship like this.These spaceships are made of a strong material （材料）.Two of them have already been sent up into space，using rockets and then later filled with air. "Balloon" spaceships could be very large and carry enough water for a long trip.With the "Balloon" spaceships，enough water could be carried to power （驅(qū)動）the engines and grow food during the trip.And the people on the spaceship might even get to take a hot bath!
Scientists say the biggest advantage of such a spaceship would be cost.The "Balloon" spaceship uses water to push it through space and costs about one thirtieth of a normal spaceship.Such savings naturally encourage continued research into "Balloon" spaceships and water engines.If these scientists are correct，we may soon be on our way to Mars in a spaceship powered by water.
（1）What's the key to the water-powered spaceship？
The engine.The engine.
（2）According to scientists，how can the future spaceship carry much water？
A spaceship blown up like a balloon will be able to.A spaceship blown up like a balloon will be able to.
（3）What can water do for the spaceship trip？
Water can power the engines，grow food and take hot baths.Water can power the engines，grow food and take hot baths.
（4）What do scientists think of the water-powered spaceship？
Low cost.Low cost.
（5）What's the main idea of this passage？
Water-powered spaceship.Water-powered spaceship.
【答案】The engine.；A spaceship blown up like a balloon will be able to.；Water can power the engines，grow food and take hot baths.；Low cost.；Water-powered spaceship.
【解答】
【點評】
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發(fā)布：2024/6/27 10:35:59組卷：1引用：1難度：0.5
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