题目内容
（请给出正确答案）
When the sun burn fiercely, ______ carbon-14 is produced.
A．less
B．more
C．no
D．much
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更多“When the sun burn fiercely, ______ carbon-14 is produced.A．lessB．moreC．noD．much”相关的问题
but a wise man and a wise guy are_ .1_ How
can 2_ speech and blunt speech be the same
and quite a lot and quite a few the same,_ _3_
overlook and oversee are opposites? How can
the weather be hot as hell one day and cold as
hell the next?
Why is it that when the sun or the moon or the
star are out, they are visible, but why the lights
are out, they are_ _4_ ; and that when I wind up
my watch, I start it, but when I wind up my essay,
Ishall_5__ it?
Still, you haveto_ 6_ at the unique lunacy of
the English language, in which the sun comes up
and goes down, but prices go up and come
down - a wonderful and crazy _ 7_ in which
your house can both burn up and burn down andi
your car can slow up and slow down, in which
you fl in a form by flling out a form, in which
your alarm clocks goes off by going on, in which
you add up a column of figures by adding them
down.
If the truth be told, all languages are a little
crazy. As Walt Whitman might 8_ they
contradict themselves. That's because language
is invented, not_ 9_ by boys and girls and men
and women, not computer. As such, language
_10_ the creative and fearful asymmetry of the
human race, which, of course, isn't really a race
at all.
A. sharp
B. proclaim C. tongue
D.still
E. marvel
F. end
G. acquire
H. while
I. escaped
J. discovered
K. reflects
L.added
M. opposites
N. invisible
O. paradox
听力原文：W: Wow, what a beautiful sunset.
M: Enjoy it while it lasts. The sun won't be around forever, you know.
W: You mean one day the sun will disappear？
M: Not exactly disappear, but the sun will eventually burn out and die.
W: Won't that make things really cold down here？
M: Actually, there won't be any here. When the sun dies, the earth will be destroyed too.
W: Whoa, hold on. Start from the beginning.
M: Ok. Like all stars the sun is basically a giant nuclear reactor that burns hydrogen to create energy. But like any reactor, the sun needs fuel to keep going. It's been going strong for around 4. 5 billion years, and will probably keep burning for about five billion more.
W: But then the fuel will run out.
M: Exactly. And when it does, gravity will cause the sun's core to contract. When it contracts, the core will get hotter, which will heat up the sun's upper layers and make them expand. The sun will then become what's called a red giant, and its radius will reach just past the orbit of Venus.
W: Which is bad for us.
M: We'll be burned to a crisp.
W: Sounds painful.
M: After a few billion years, the core will begin to cool and expand. The sun's upper layers will expand and lose material, and eventually the core will cool enough to become a white dwarf star, and finally a black dwarf.
W: So we're pretty much doomed.
M: Yes, but not for billions of years. Who knows？ By then humans might be living on another planet. Or we'll have been enslaved by a bunch of dirty apes!
W: I think someone's been watching too much cable TV.
(23)
A．Late in the afternoon.
B．Early in the morning.
C．At midnight.
D．At noon.
B.They replace some of the need to burn coal.
C.It is made by nature deep in Earth.
D.Without resources, humans could not live on Earth.
E.Trees, air, water and energy from the sun are renewable resources.
F.Luckily, humans are finding new ways to replace coal.
_____.A.These are called nonrenewable resources.
B.They replace some of the need to burn coal.
C.It is made by nature deep in Earth.
D.Without resources, humans could not live on Earth.
E.Trees, air, water and energy from the sun are renewable resources.
F.Luckily, humans are finding new ways to replace coal.
_____.A.These are called nonrenewable resources.
B.They replace some of the need to burn coal.
C.It is made by nature deep in Earth.
D.Without resources, humans could not live on Earth.
E.Trees, air, water and energy from the sun are renewable resources.
F.Luckily, humans are finding new ways to replace coal.
_____.A.These are called nonrenewable resources.
B.They replace some of the need to burn coal.
C.It is made by nature deep in Earth.
D.Without resources, humans could not live on Earth.
E.Trees, air, water and energy from the sun are renewable resources.
F.Luckily, humans are finding new ways to replace coal.
_____.A.These are called nonrenewable resources.
B.They replace some of the need to burn coal.
C.It is made by nature deep in Earth.
D.Without resources, humans could not live on Earth.
E.Trees, air, water and energy from the sun are renewable resources.
F.Luckily, humans are finding new ways to replace coal.
请帮忙给出每个问题的正确答案和分析，谢谢！
The sun will burn you ______ you' re not careful.
A．if
B．and
C．but
D．unless
James: How is your sun burn today？
Jane: It's much better. The cream you gave me is of great help.
James: _________
A．You should thank me for that.
B．I know it will work.
C．I' m glad to hear that.
D．I got the recipe from my grandma.
Everyone needs and uses energy. If there were no energy,【46】
Most of the energy on this planet comes from the sun, but people do not receive that energy directly. It comes from different sources and in different forms.
Green plants convert the sun's energy to food energy that animals and people use for life. The energy from animals has been used for hundreds of years to operate farm equipment and to pull carts, wagons , and other vehicles.
The sun's energy takes water from rivers, lakes, and oceans and【47】When rain or snow falls on the land some of it flows into rivers and streams. This flowing water can be used to【48】Water can also be converted (更换) to steam, which produces energy to operate machines.
Winds also come from solar energy. Air that has been heated by the sun rises and creates winds. The process of winds has moved ships on the sea, ground grain, and brought water to the earth.
There is also solar energy in wood, oil, and coal. These fuels have been【49】People burn them to produce heat and to create power for machines. Oil and coal are used to produce electrical energy, too. And electricity produces light heat, and sound energy. In addition, electric power operates (操作) many kinds of equipment, tools, and machines, which make work easier.
If you made a list of all the jobs performed by the different kinds of energy, you would fill many pages . The need for power increases every day, and some sources of energy【50】So scientists and technicians are trying to find new ways to produce power.
A. formed over many centuries from plants.
B. returns it to the earth in the form. of rain or snow.
C. are being used up very quickly.
D. there would be no life.
E. produce mechanical energy and electricity.
F. are being produced everyday.
(46)
听力原文： When Iraqi troops blew up hundreds of Kuwaiti oil wells at the end of the Gulf War, scientists feared environmental disasters. Would black soot in the smoke from the fires circle the globe and block out the sun？
Many said "no way"; rain would wash the black soot from the atmosphere. However in America, air-sampling balloons have detected high concentrations of particles similar to those collected in Kuwait.
Now that the fires are out, scientists are turning their attention to yet another threat: the oil that didn't catch fire. It has formed huge lakes in the Kuwaiti desert. They trap insects and birds, and poison a variety of other desert animals and plants.
The only good news is that the oil lakes have out affected the underground water resources. So far, the oil has not been absorbed because of the hard sand just below the surface.
Nothing, however, stops the oil from evaporating. The resulting poisonous gases are choking nearby residents.
Officials are trying to .organize a quick cleanup, but they're not sure how to do it. One possibility is to burn the oil. Get those black soot detectors ready.
(31)
A．The threat of poisonous desert animals and plants.
B．The exhaustion of energy resources.
C．The destruction of oil wells.
D．The spread of the black soot from the fires.
Many said" No way？; Rain would wash the black powder from the atmosphere. But in America, air-sampling bal loons have detected high concentrations of particles similar to those collected in Kuwait didn't catch fire. It has formed huge Takes in the Kuwaiti desert. They trap insects and birds ,and poison a variety of other desert animals and plants.
The only good news is that the oil lakes have not affected the underground water resources. So far, the oil has not been absorbed because of the hard sand just below the surface.
Nothing, however, stops the oil from evaporating. The resulting poisonous gases are choking nearby residents.
Officials are trying to organize a quick cleanup, but they are not sure how to do it. One possibility is to burn the oil. Get those black-powder detectors ready.
What were the scientists worried about soon after the Gulf War？
A．The threat of poisonous desert animals and plants.
B．The exhaustion of energy resources.
C．The destruction of oil wells.
D．The spread of the black powder from the fires.
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