题目内容
（请给出正确答案）
A、hardness is either high or low
B、solid conductive
C、liquid conductive
D、high melting point
E、poor plasticity
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更多“Crystals which are mainly form…”相关的问题
A、high melting point
B、poor plasticity
C、low hardness
D、solid conductive
E、liquid non-conductive
A、Solid at room temperature常温固态
B、Conductor of electricity导电性
C、High melting point高熔点
D、Made of microscopic crystals微观晶粒组成
W: I recently read that in ten years we'll be wearing clothes that change with the weather. So when it's cold, our clothes will warm up, and when it's hot, our clothes will cool off.
M: Oh, very funny! So we'll be wearing huge clothes with built-in air-conditioners and heaters.
W: I'm serious. Researchers have discovered a method of treating fibers with plastic crystals which can store and release heat as the temperature changes. These treated fibers absorb more heat than untreated fibers. Researchers are still working with this, but soon this process will be widespredad.
M: That's fascinating. I didn't know that fibers can store heat. How does that work？
W: These fibers work with the heat by rearranging their structures.
M: That's truly unbelievable. You said that it'll be a decade before this type of clothes will be available. What a shame! I don't think I can wait that long.
What's the man's first reaction to what the woman describe？
A．He is shocked.
B．He is excited.
C．He is upset.
D．He is doubtful.
M: I recently read that in ten years we'll wearing clothes that change with the weather. So when it's cold, our clothes will warm up, and when it's hot, our clothes will cool off.
W: Oh, very funny. So we'll be wearing huge clothes with built-in air conditioners and heaters.
M: I'm serious. Researchers have discovered a method of treating fibers with plastic crystals which can store and release heat as the temperature changes. These treated fibers absorb more heat than untreated fibers. Researchers are still working with this, but soon this process will be widespread.
W: That's fascinating. I didn't know that fibers could store heat. How does that work？
M: These fibers work with the heat by rearranging their structures.
W: That's truly unbelievable. You said that it'll be a decade before this type of clothes will be available. What a shame! I don't think I can wait that long.
What's the man's first reaction to what the woman describes？
A．He is shocked.
B．He is excited.
C．He is upset.
D．He is doubtful.
A．The relative thinness of amorphous materials.
B．The cost of amorphous materials.
C．The size of solar cells which can be made of amorphous materials.
D．All of the above.
A．The relative thinness of amorphous materials.
B．The cost of amorphous materials.
C．The size of solar ceils which can be made of amorphous materials.
D．All of the above.
Which of the following is the best title for the passage？
A．How are Cloud Droplets Formed
B．How is Rain Formed
C．Cloud Droplets and Water Droplets
D．How are Ice Crystals Produced
W: I recently read that in ten years we'll be wearing clothes that change with the weather. So when it's cold, our clothes will warm up, and when it's hot, our clothes will cool off.
M: Oh, very funny! So we'll be wearing huge clothes with built-in air conditioners and heaters.
W: I'm being serious! Researchers have discovered a method of treating fibers with plastic crystals capable of storing and releasing heat as the temperature fluctuates. These treated fibers absorb more heat than untreated fibers. Researchers are still working with this, but soon this process will be widespread.
M: That's fascinating. I didn't know that fibers had the capability of storing heat. How does that work？
W: These fibers work with the heat by rearranging their structures. The treated fibers move back and forth between two solid shapes.
M: I don't understand. What kind of shapes do they change into？
W: When the weather gets warmer, the crystals take on cube shapes and absorb heat. When the weather gets cooler, the crystals become cooler and come back to their original structure.
M: That's truly unbelievable. You said that it'd be a decade before this type of clothes will be available, What a shame! I don't think I can wait that long.
(23)
A．He is indifferent.
B．He is doubtful.
C．He is disgusted.
D．He is alarmed.
Glaciers are large masses of ice on land that show evidence of past or present
movement. They grow by the gradual transformation of snow into glacier ice.
A fresh snowfall is a fluffy mass of loosely packed snowflakes, small delicate ice
constals grown in the atmosphere. As the snow ages on the ground for weeks or months,
(5) the crystals shrink and become more compact, and the whole mass becomes squeezed
together into a more dense form, granular snow. As new snow falls and buries the older
snow, the layers of granular snow further compact to form. firm, a much denser kind of
snow, usually a year or more old, which has little pore space. Further burial and slow
cementation―a process by which crystals become bound together in a mosaic of
(10) intergrown ice crystals―finally produce solid glacial ice. In this process of
recrystallization, the growth of new crystals at the expense of old ones, the percentage of
air is reduced from about 90 percent for snowflakes to less than 20 percent for glacier ice.
The whole process may take as little as a few years, but more likely ten or twenty years or
longer. The snow is usually many meters deep by the time the lower layers art convened
(15) into ice.
In cold glaciers those formed in the coldest regions of the Earth, the entire mass of ice
is at temperatures below the melting point and no free water exists. In temperate glaciers,
the ice is at the melting point at every pressure level within the glacier, and free water is
present as small drops or as larger accumulations in tunnels within or beneath the ice.
(20) Formation of a glacier is complete when ice has accumulated to a thickness (and thus
weight) sufficient to make it move slowly under pressure, in much the same way that solid
rock deep within the Earth can change shape without breaking. Once that point is reached,
the ice flows downhill, either as a tongue of ice filling a valley or as thick ice cap that
flows out in directions from the highest central area where the most snow accumulates.
The up down leads to the eventual melting of ice.
Which of the following does the passage mainly discuss？
A．The effect of glaciers on climate
B．Damage from glaciers
C．Glacier formation
D．The location of glaciers
W: I recently read that in ten years we'll be wearing clothes that change with the weather. So when it's cold, our clothes will warm up, and when it's hot, our clothes. will cool off.
M: Oh, very funny! So we'll be wearing gigantic clothes with built-in air conditioners and heaters.
W: I'm being serious! Researchers have discovered a method of treating fibers with plastic crystals capable of storing and releasing heat as the temperature fluctuates. These treated fibers absorb more heat than untreated fibers. Researches are still working with this, but soon this process will be widespread.
M: That's fascinating. I didn't know that fibers had the capability of storing heat. How does that work？
W: These fibers work with the heat by rearranging their structures. The treated fibers move back and forth between two solid shapes.
M: I don't understand. What kind of shapes do they change into？
W: When the weather gets warmer, the crystals take on cube shapes and absorb heat. When the weather gets cooler, the crystals become cooler and revert back to their original teragonal structure.
M: That's truly unbelievable. You said that it'll be a decade before this type of clothes will be available. What a shame! I don't think I can wait that long.
(20)
A．He is surprised.
B．He is skeptical.
C．He is disgusted.
D．He is alarmed.
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