题目内容
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A．Gas is difficult to transport over long distances.
B．The system of long-distance pipelines is not available.
C．Gas is not so environmentally-friendly as other fuels.
D．The potential profits are far from enormous.
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更多“A．Gas is difficult to transport over long distances.B．The system of long-distance pipe”相关的问题
A、I fall upon the thorns of life! I bleed!
B、Away! Away! For I will fly to thee, / Not charioted by Bacchus and his pards, / But on the viewless wings of Poesy.
C、One shade the more, one ray the less / Had half impaired the nameless grace.
D、And then my heart with pleasure fills, / And dances with the daffodils.
A、TV, movies, and the Internet will become dominant fixtures in their lives.
B、They may suffer from depression, anxiety or a decrease in self-esteem.
C、Their lives will be improved by such a pleasant diversion.
D、They will no longer live their lives in a fantasy world.
| This problem may lead to more serious ones if _____ unsolved. |
[ ] |
| A. left B. remained C. keeping D. making |
Mercury, the planet nearest the sun, is difficult to observe from the Earth because it rises and sets within two hours of the sun. ______【46】
Planetary scientists can estimates the age of a planet's surface by the number of impact craters on it. In general, the older the surface, the more craters it has. ______【47】. Between these regions are areas of gently rolling plains that may have been smoothed by volcanic lava flows or by accumulated deposits of fine material ejected during impacts. These plains are also old enough to have accumulated a large number of impact craters. Elsewhere on the planet are smooth, flat plains that are probably younger and volcanic in origin. ______【48】. Sometime between the formation of the intercrater plains and the formation of the smooth plains, the whole planet may have shrunk as it cooled, causing the crust to buckle and form. the long, steep cliffs called scarps.
The largest impact basin on Mercury has a diameter of about 800 miles (1, 300 kilometers) and is surrounded by mountains that rise to heights of about 1. 2 miles (2 kilometers). ______【49】.
On the opposite side of the planet is an area of hilly, linear terrain that probably resulted from seismic waves caused by the same impact.
Like other airless, solid bodies in the solar system, the entire surface of Mercury is covered with a layer of rubble called regolith, which is composed of material, ranging from dust to boulders, that was scattered when impact craters were formed. This debris was in turn broken up and redistributed by subsequent impacts.
Mercury is very dense and has a magnetic field that is about 1 percent as strong as earth's. This suggests the existence of a planetary core composed of iron and nickel and constituting about 40 percent of the planet's volume. ______【50】. Radar images taken of Mercury in 1991 show what are considered to be large ice patches at the planet's North Pole.
A. Some regions on Mercury are heavily cratered, suggesting that they are very old surfaces that were probably formed about 4 billion years ago
B. The crater was probably created by the impact of a large planetesimal when Mercury was forming
C. Consequently, little was known about the planet until the Mariner 10 spacecraft made several flybys in 1974 and 1975
D. Mercury is much smaller than the Earth
E. The surface gravity is about one-third as strong as Earth's, and a thin atmosphere surrounds the planet
F. These plains have relatively few impact craters
(46)
A．impulse
B．resemblance
C．obligation
D．sympathy
W：The day your Dad takes me to Paris is the day pigs fly．
Q：what does the woman mean?
(19)
A．Paris is not romantic enough.
B．Paris is not modern enough.
C．They're not very likely to go to Paris.
D．It's impossible that they will go to Paris.
A．Any astronaut returns from the universe is safe.
B．Any astronaut returns from the universe suffers a lot.
C．We can assume that an astronaut is safe from his bad looks.
D．We cannot assume that an astronaut is safe from his good looks.
A．To let out clean gas.
B．To take in harmful gas.
C．To use various plants.
D．To let the air flow freely.
Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer.
(12)
A．People are expected to come at six.
B．A formal party will be held.
C．It will be a party for relaxation.
D．There is no need to prepare special clothes.
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