题目内容
（请给出正确答案）
Crustal rocks can be used to predict earthquakes for their ______.
A．conductivity of electricity
B．hardness to be cracked
C．sensitivity to strain
D．magnetic properties
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更多“Crustal rocks can be used to p…”相关的问题
A disadvantage of fluid measuring is that ______.
A．fluid saturation of rocks can be caused by changes other than strain
B．present scientific instruments are not able to provide precise measurement
C．the electrical properties of the rock itself also change, the fluid capacity of rocks
D．fractures in these rocks are often so serious that accurate measurement is impossible
Around North America, we can visit young mountains, such as the Cascades of the Pacific Northwest, that continue to rise higher even today. We can also visit older mountains, such as the Appalachians of eastern North America, that may have been much loftier once but have long since reached their maximum heights and begun eroding (腐蚀) away. We can even visit the eroded cores of ancient, now-departed mountains, like those widely exposed in Minnesota, Wisconsin, and northern Michigan and throughout the provinces of eastern Canada.
We can even see future mountains growing. In the rocks along Sagami Bay near Yokohama, Japan, lives a colony of clams (蛤蜊) called Lithophaga, or "rock eaters". These creatures scoop (挖) out small shelters for themselves from the soft rocks at sea level, and wait there for high tide to flood their homes and bring their meals of marine algae (海藻). At the moment of Japan's great earthquake of 1923, the land at Sagami Bay shifted upward, leaving rows of Lithophaga to starve 5 meters (16 feet) above sea level. Even higher rows of abandoned Lithophaga dwellings populate the cliffs at Sagami Bay, including one that correlates with the area's 1703 quake and another that correlates with its earthquake of 818. The rocks adjacent to the bay have risen roughly 15 meters (50 feet) during the past 2000 years.
What is the main idea of the second paragraph？
A．People are mysteriously attracted to mountains.
B．People can climb different mountains every year.
C．Some mountains rise higher all the time.
D．Old, new, and ancient mountains exist.
he moon toward the sun gets two degrees hotter than boiling water(沸水).The night side reaches 243 degrees below zero(零度).In an eclipse(月蚀),the earth's shadow falls on the moon.Then the moon's temperature may drop 300 degrees in a very short time.A temperature change like this cannot happen on the earth.Why does it happen on the moon？Astronomers think that the surface of the moon is dust.On the earth,rocks store heat from the sun.When the sun goes down,the rocks stay warm.But the dust of the moon cannot store heat.So when the moon gets dark,the heat escapes quickly.The moon gets very cold.
During an eclipse, the moon is ()
A、turned away from the sun
B、in the shadow of the sun
C、in the shadow of the earth
D、in direct sunlight
听力原文： Clay is found almost everywhere in the world. (32) It is formed by the action of wind and water on rocks over thousands of years. The rocks change in both chemical and physical ways. Chemically, elements are added and taken away. Physically, the rocks break down into smaller and smaller pieces. After a long time, some of the rock changes to clay. (33) Clay is important because it is used around the world to make containers of all kinds. Potters add water to soften the clay. This makes it easier to form. into shapes by hand or by machine. Then it is fired in an extremely hot stove. The result is a container with a hard surface that will last for many years. You can usually find good clay (34) in low areas of islands or land, especially if volcanoes helped form. the land. (34) Clay often exists in fields covered with some water. The clay will be found about one meter below the ground. (34) River banks often also have clay about one meter or less under the surface. You can recognize clay (35) because it is very shiny when it is wet. You can also perform. a test. Take some of the material and add enough water to it to make it seem like you are making bread. Then press it in your hand until it is about the size of an egg. It is probably clay if it holds together instead of falling apart when you stop pressing.
(33)
A．The natural force makes it come into being.
B．It originates from some chemical elements in the nature.
C．It comes from the rocks with the action of wind and water.
D．A series of biological changes happen in the process.
The sun is one of the stars.Some planets are balls of rock and some are balls of gas.We live on the planet earth.The earth spins around once every day to give us day and night.The earth goes around the sun once every year to give us different seasons.
There are eight planets moving around the sun.We call the family of the sun and its planets the solar system.Mercury is the nearest to the sun, so it is very hot.It is the smallest planet.Venus is very bright and hot.It is the nearest to the earth.Mars is covered with orange-red desi and rocks, so it looks like a red star in the sky.It has seasons like the earth.Jupiter has more than 16 moons (卫星)and it is the biggest and heaviest planet.Saturn has more than 22 moons.The other planets, such as Uranus and Neptune, are all very far from the sun and very cold.We need a telescope (望远镜) to see them.
(1)The sun can give us().
A.heat and water
B.heat and light
C.light and air
D.rock and water
(2)The Chinese meaning of "spin around" is().
A.飞行
B.行驶
C.环绕
D.旋转
(3)The earth goes around()once every year to give us different seasons.
A.the moon
B.Mars
C.Jupiter
D.the sun
(4)Mars looks red in the sky because().
A.it is covered with orange- red dust and rocks
B.it has seasons like the earth
C.it is the nearest to the earth
D.it is covered with red water and dust
(5)Which is NOT true according to the passage？ ()
A.Jupiter is the biggest and heaviest planet.
B.Uranus is very far from the sun and very cold.
C.The revolution(公转) of the earth gives us different seasons.
D.We call the family of the sun and its planets the Milky Way.
1)、A.about
B.hear
C.old
D.too
E.Many
2)、A.about
B.hear
C.old
D.too
E.Many
3)、A.about
B.hear
C.old
D.too
E.Many
4)、A.about
B.hear
C.old
D.too
E.Many
5)、A.about
B.hear
C.old
D.too
E.Many
听力原文： American scientists have found that some birds are more intelligent than experts had originally believed. The scientists say birds have abilities that involve communication and different kinds of memory. In some unusual cases, their abilities seem better than those of humans.
Griffin is a Grey parrot. He lives in his laboratory at the Massachusetts Institute of Technology in Cambridge. Griffin can arrange objects in order of size. He can also combine words in the right order. For example, he will combine words when asking for a piece of food.
Some birds have other memory skills. For example, they collect and store thousands of seeds in autumn, and find them later in winter. These birds use natural objects to find the seeds they have stored. They use at least three objects, such as rocks or trees, to find the stored seeds.
A jay can be trained to choose one object instead of another. The bird uses this skill to receive a prize, such as food.Scientists also say some birds can learn as many as two thousand different songs. They say songs may have developed as a way for birds to communicate with other birds.
Scientists believe that birds must have a special guidance system in their brain. Understanding how a bird's brain operates may help us better understand how a human brain processes information.
(26)
A．Talking.
B．Communication and memory.
C．Singing.
D．Finding the way.
听力原文： Three men are found smashing boulders with iron hammers.When asked what they are doing,the first man says,"Breaking big rocks into little rocks."The second man says,"Feeding my family."The third man says, "Building a cathedral."
Today's column focuses on the third man,the one who saw each hammer blow as contributing to the construction of a cathedral,a home for human dreams and sacred aspirations.To many of us who study and consult in occupational and organizational contexts,we would call what this third man does meaningful work.
I have come to see meaningful work as consisting of three central components.First,the work we do must make sense; we must know what's being asked of us and be able to identify the personal or organizational resources we need to do our job．Second,the work we do must have a point；we must be able to see how the little tasks we engage in build,brick-by-brick if you will,into an important part of the purpose of our company.Finally,the work that we do must benefit some greater good；we must be able to see how our toil helps others, whether that's saving the planet,saving a life,or making our co-workers'jobs easier so that they can go home and really be available for their families and friends．A growing body of evidence shows that meaningful workers are happy workers,more committed workers,and, in some tantalizing ways,better workers.
What does the second man answer when asked what they are doing？
A．Breaking big rocks into little ones
B．Feeding his family.
C．Building a cathedral.
D．Doing construction works.
The crashing of the Sea Empress was a disaster, but it gets worse. A lot of the oil washed up on the shores of Milford Haven Estuary, a conservation area for birds and other wildlife close to where the ship crashed. This made many residents and nature lovers around the world very angry.
Oil and Water
People are upset because oil spills happen regularly. In North America, there are over 8000 spills each year. Not all of them are as big as the one caused by the Sea Empress. Most spills are quite small—they happen in marinas(小船坞) when motor boats fill up with gasoline. Bigger spills occur when oil barrels are accidentally dumped and when ships clean out their cargo holds. But no matter how much oil ends up in the water, plants and animals suffer or die.
In 1989, after an oil tanker called the Exxon Valdez spilled its load in Prince William Sound near Alaska, 425,000 sea birds died along with thousands of other animals, including sea otters. This ship dumped only half the oil the Sea Empress did! The Exxon spill covered 880 km of ocean and fouled about 2000 km of coastline. That's enough coastline to reach from Montreal all the way to Winnipeg.
Cleaning Up the Mess
When oil is spilled on water it forms a sheen. That's a very thin layer of oil that sits on top of the water's surface. One of the jobs of clean-up crews is to try to keep the sheen from spreading out to sea. The tool they use is a containment boom(栅栏网). They wrap this boom around the oil spill to keep it in place. Once the oil has been contained it can be burned off the water.
Another way to get rid of the oil is to sprinkle it with a product that absorbs it, like wood waste. The waste is then scooped away before it sinks. Naturally, some oil always escapes out to sea. Eventually, the oil breaks down and forms tar balls. These balls sink to the ocean floor, then sooner or later they are washed up onto shore.
With every oil spill, some oil reaches the shoreline. The mess is unbelievable. When cleaning up a spill, the hardest job is dealing with the onshore pollution. When oil lands on rocks or mixes with sand and seaweed, it becomes really difficult to remove. Volunteers use high-pressure hoses to blast the oil with hot water. They try to push the oil back into the water. If it's in the water they can burn it or skim it off the surface.
Caring for the Animals
After an oil spill, a lot of concerned people volunteer to help care for the animals. Very little can be done to save the crustaceans, mollusks(软体动物), and other small creatures that get smothered in oil. But the larger animals that are caught and cleaned can be saved.
Birds like western grebe need to have their feathers washed to survive. They’re given baths with plenty of soap and are scrubbed down using toothbrushes. Turtles, otters, and all kinds of other large animals go through the same process. Everyone's hard work pays off. Many animals are saved. But the pollution has a lasting effect—it gets into the food web and makes a lot of animals(including people) sick. Birds, fish, and scav
A．Y
B．N
C．NG
听力原文：M: Hi, Sue.
W: Hello, Jill, how are you？
M: I'm fine. Did you watch the TV special about barnacles last night？
W: No, I missed it. What did you learn about them？
M: They glue themselves to rocks in the ocean, shortly after birth. They also stay in the same place forever.
W: Right, have you ever tried removing one of these things？ It would be easier to chip the rock away than to get the barnacles off.
M: Exactly, and that's why scientists are trying to figure out what the barnacles glue is made of. It's considered one of the strongest adhesives in nature.
W: And it would have the advantage of being able to work on wet surfaces too.
M: Precisely, and because it's natural protein, it probably wouldn't be harmful to people like so many synthetic glues in use today.
W: Think of all the ways in which doctors and dentists could use such a glue to mend broken bones and fasten false teeth.
M: There could be countless uses. Scientists hope to learn soon exactly how the glue is made, so that people can make use of it.
W: That's good news for the general public. I hope it won't take long for the new glue to be put into use.
(23)
A．The reproductive cycle of barnacles.
B．A new source of protein.
C．Types of sea animals.
D．The adhesive quality of barnacles.
