更多"第一篇An Expensive Mistake
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[单项选择]第一篇An Expensive Mistake
Is there water on the planet Mars Is there life on Mars Was there ever life on Mars Scientists from NASA wanted to know the answers to these questions. They built a spacecraft to travel around Mars and get information. The spacecraft was called the Mars Climate Orbiter.
The Mars Climate Orbiter left for Mars on December 1998. The trip took nine and a half months. At first, everything was fine. However, when the Orbiter got near Mars, something terrible happened. The spacecraft didn’t go to the right place. It went too close to Mars. It was too hot for the Orbiter there. The spacecraft couldn’t function correctly. Suddenly, it stopped sending messages to NASA. The Orbiter was lost.
How could this terrible thing happen How did the Orbiter get closer to Mars than the scientists planned Finally, they found the answer. Two teams of scientists worked together on the Orbiter. One team was in England, and one team was in the United States. There were many simila
A. the size of Mars.
B. possible life on Mars.
C. the shape of Mars.
D. the atmosphere of Mars.
[单项选择]第一篇
Water
The second most important constituent (构成成份) of the biosphere (生物圈) is liquid water. This can only exist in a very narrow range of temperatures, since water freezes at 0℃ and boils at 100℃. Life as we know it would only be possible on the surface of a planet which had temperatures somewhere within this narrow range.
The earth’s supply of water probably remains fairly constant in quantity. The total quantity of water is not known very accurately, but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers. Most of it is in the form of the salt water of the oceans about 97 percent. The rest is fresh, but three quarters of this is in the form of ice at the Poles and on mountains, and cannot be used by living systems until melted. Of the remaining fractional which is somewhat less than one per cent of the whole, there is 10—20 times as much stored underground wat
A. in the center of the earth.
B. on the surface of our planet.
C. in a very narrow range of temperatures.
D. in the coastal areas of the earth.
[单项选择]第一篇
Youth Emancipation in Spain
The Spanish Government is so worried about the number of young adults still living with their parents that it has decided to help them leave the nest.
Around 55 percent of people aged 18-34 in Spain still sleep in their parents’ homes, says the latest report from the country’s state-run Institute of Youth.
To coax (劝诱) young people from their homes, the Institute started a "Youth Emancipation (解放)" program this month. The program offers guidance in finding rooms and jobs.
Economists blame young people’s family dependence on the precarious (不稳定的) labor market and increasing housing prices. Housing prices have risen 17 percent a year since 2000.
Cultural reasons also contribute to the problem, say sociologists (社会学家). Family ties in south Europe - Italy, Portugal and Greece - are stronger than those in middle and north Europe, said Spanish sociologist Almudena Moreno Minguez in her report "The Late
A. fight for freedom.
B. live in an independent way.
C. fight against social injustice.
D. get rid of family responsibilities.
