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The world is ___1___ of variety(各种各样). Trees, grasses and other ___2___ cover the earth. Above, ___3___ shines on the earth as it turns in the universe. This is the world that we see ___4___ us every day.
This world is ___5___the world of chemistry. In this world one form of matter is ___6___ changing into another. We cannot always see it ___7___ with our eyes. Yet it is taking ___8___ all the time. The millions of forms on the each, living or not, are ___9___ about one hundred chemical elements (元素). The same elements are found everywhere. This may be a surprise to you, but it is true. It is true ___10___ Of the earth ___11___ of the whole universe.
1.[ ]
A. fill B. filled C. full D. fell
2.[ ]
A. planets B. planes C. plants D. put
3.[ ]
A. the stars B. the satellites
C. the moon D. the sun4.
[ ]
A. above B. under C. round D. about
5.[ ]
A. also B. too C. either D. neither
6.[ ]
A. sometimes B. never C. anytime D. always
7.[ ]
A. happen B. to happen C. happening D. happened
8.[ ]
A. play B. place C. space D. room
9.[ ]
A. made with B. made by C. made in D. made Of'
10.[ ]
A. not only...but also B. either...orC. neither...nor D. so...that
查看习题详情和答案>>Is the sky blue? The sky has no colour. We know that there is air around the world. When planes fly，they need air to lift their wings(翅膀).Planes cannot fly very high because when they go higher，the air gets thinner. If we go up about l 200 kilometers from the earth，we find there is no air.
Perhaps we can answer some of our questions now. The sky is space. In this space there is
only the sun，the moon and all the stars.
根据短文内容选择正确答案:
1.What is the sky?( )
A. It’s the clouds. B. It's space.
C. It’s air. D. It’s nothing.
2.They sky________.( )
A. is blue B. is white
C. is black D. has no colour
3.A plane cannot fly very high because________.( )
A. the air becomes thinner
B. the flying machine is not good
C. people Will be afraid if the planes fly too high
D. it is not necessary for planes to fly so high
4.If we go up about l 200 kilometers from the earth，we find________.( )
A. there is more air B. there is 1ess air
C. there is nothing but air D. there is no air
5.In space there is________.( )
A. nothing B. air everywhere
C. everything D. only the sun. the moon and all stars
查看习题详情和答案>>
aren't real stars. They're satellites, a machine that has been sent into space and goes around the Earth, moon,
etc. And the biggest of all is the International Space Station (ISS).
The ISS is the biggest satellite because scientists want to live on it. They think that the best way to learn
more about space is to live there. The space shuttle Discovery has taken off from the Kennedy Space Center
in Cape Canaveral, Florida several times and carried a few groups of astronauts to the International Space
Station.
When the space station is finished, it will be like a city in space. People will stay and study there with many
of the things they have at home. Laboratories, living rooms and power stations are being built. The ISS is the
most expensive space program ever. Millions and millions of dollars are being spent on it every year.
Scientists hope that the ISS will be a stepping stone for future space exploration. "The ISS will help us
better understand the human body, explore (know more about) space and study the earth. It can help us make
life on the earth better," said Kathryn Clark, an ISS scientist.
Sixteen countries are in the program: The US, Russia, Canada, Japan, Brazil and 11 European countries.
China is not an ISS country, but it has helped with some of the experiments. In 2003, China sent some rice
up to the ISS to find out what space would do to it.
Twenty Chinese students talked directly to an astronaut (spaceman) in the International Space Station (ISS)
on radio in Nanjing, capital of east China's Jiangsu Province on Sunday, 2007. The 20 students, aged 10 to 19
from Shanghai, Guangzhou and Nanjing, began talking to Clayton C. Anderson, a 48-year-old American
astronaut at 18:50 p.m. at Nanjing No. 3 Middle School when the ISS was passing over Nanjing.
After it's finished, more than 90 percnt of the world's population will be able to see the space station. So
keep looking up, and maybe you'll see it get bigger and brighter.
B. some students from Nanjing have been to the ISS
C. China is one of the members in the ISS group
D. the ISS is still in the space but has stopped working
B. machines that go around the earth, the moon and some stars
C. buildings where electricity is produced to supply a large area
D. some countries which help send the ISS up into space
—Because they _______.
B. could talk with some Chinese school students
C. hoped to travel to Mars and Venus some day
D. wanted to live in space and do better research
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