高三阅读理解A group of college students is hoping to
时间:2017-01-04 08:58 作者:admin 来源:本站整理
A group of college students is hoping to place a satellite powered only by water into an orbit (轨道) around the moon.
The students are from Cornell University in the state of New York. They are taking part in a competition called the Cube Quest Challenge. It is a program of NASA, the American space agency. The Cornell team is called the CisLunar Explorers. The word cislunar means “between the earth and the moon.”
The challenge is simple: to design, build and deliver “flight-qualified, small satellites.” NASA officials say the satellites must be able to perform “advanced operations near and beyond the moon.”
Ten teams are taking part in the competition. But the CisLunar Explorer satellites are different. They are the only ones using water to power their spacecraft.
The idea for a water-powered vehicle came from Mason Peck, who works at Cornell University. He once worked as NASA’s chief technologist. He has always wanted to use something other than rockets to push spacecraft beyond earth. “A lot of the mass we send into orbit these days is in the form of rockets -- the only way we get anything into space,” he said, in a Cornell press release. “But what if we could use what’s already there? If we could do that, if we could re-fuel spacecraft while they’re already in space...”
The spacecraft is shaped like the English letter L. It measures about 30 centimeters in length, and the two pieces are connected. Water is stored in the lower part of the satellite. The sun will separate the water into two elements: hydrogen and oxygen. When one combines hydrogen and oxygen with a spark (火花), an explosion results. This provides a forward movement, known as thrust.
The CisLunar Explorer team has an unusual way to guide its spacecraft. The idea is to copy how old-time sailors used the moon, sun and stars to fix their position on the oceans. The satellite is equipped with cameras. The cameras will take pictures of the sun, the earth and the moon and compare their positions and their sizes. Based on where the sun, moon and earth are at any given time, the CisLunar Explorers will do the mathematics to find their position.
The competition is being held in four parts. The Cornell team has been among the top three competitors during parts one and two. The winners of the third stage will be announced in about a month. The final three winners will be announced in early 2017. They will get to ride on NASA’s space launch system in early 2018.
63. The essential part of the competition “the Cube Quest Challenge” is ______.
A. to launch a satellite to take a watery flight to the moon
B. to design, build and deliver a small and flight-qualified satellite
C. to place a satellite powered only by water into an orbit around the moon
D. to make the satellite perform advanced operations near and beyond the moon
64. What does Mason Peck want to do at Cornell University according to the passage?
A. To stop using rockets for the sake of safety.
B. To use something already in space as power.
C. To try using water in space to push spacecraft.
D. To design a water-powered vehicle to push spacecraft.
65. It can be inferred from the passage that ______.
A. there is a lot of rubbish of rockets and satellites in the orbit these days
B. a water-powered satellite will soon be sent into the orbit around the moon
C. the explosion of the combination of hydrogen and oxygen provides power
D. the team members of the CisLunar Explorers are the students of Mason Peck
66. What would be the best title of the passage?
A. A Spacecraft Powered by Water
B. A Water-Powered Flight to the Moon
C. A Competition for Water-Powered Satellite
D. A Design of Water-Powered Space Journey
答案 63-66: DBCA
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