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Many people watched the lift-off of the space shuttle Columbia on March 21, 1982. But none watched more closely than eighteen-year-old Ted, as Ted’s insects were on board the shuttle.
The Shuttle Student Involvement Program invited students to make a science experiment. The experiment would be done by astronauts on the space shuttle.
Ted had always been interested in space and flight. Insect flight especially interested him. Ted noticed that insects need gravity to take off and land. They need gravity to fly in a straight line. But in space, there is no gravity. Could insects fly in zero gravity? That is what Ted wanted to find out.
Ted made an experiment called “Insect in Flight Motion Study”. He entered his experiment and soon news came that it was a winner.
A large team of scientists and engineers helped Ted get his experiment ready to fly. There were many questions to be answered first. What kind of insects would Ted use in his experiment? The insects would have to be strong enough to live on the shuttle for nine days without much food. What kind of container would hold the insects? Would the insects die during the shuttle flight?
After months of hard work, the “insectronauts” were chosen. A group of moths, flies, and honeybees were put into a special box and put onto the space shuttle. When Columbia flew into space, it was carrying insect passengers.
On March 24, astronauts Gordon Fullerton and Jack Lousma took out the box that held the insects. They began filming the insects with a special video camera.
When the space shuttle landed Ted was able to watch the video film of insects. Just as he thought, most of the insects did have trouble flying in zero gravity. The flies did well. But the moths’ flight seemed “uncontrolled”. They would often just hang in the air. The bees had the most trouble. They couldn’t fly at all! The film showed bees spinning around in all directions. Others were just floating about in the box.
Ted learned the answer to his question about insects’ flight in zero gravity. But he also learned a lot more. He learned about the hard work needed in making a successful experiment.
【小题1】What does the underlined sentence “it was a winner” mean?
| A.Ted could fly in space. | B.Ted won a prize. |
| C.Ted’s experiment was accepted. | D.Ted won in a race. |
| A.Whether the insects could fly in space. |
| B.Whether the insects could fly in a straight line. |
| C.Whether the insects could land after flying for a while. |
| D.Whether the insects could take off after resting for a while. |
| A.The flies. | B.The honeybees. | C.The insects. | D.The moths. |
| A.Ted himself. |
| B.Ted’s friend. |
| C.A large team of scientists and engineers. |
| D.Two astronauts on the space shuttle. |
| A.By asking the scientists and engineers. |
| B.By studying a book written by the astronauts. |
| C.By going into space and watching the insects’ flight himself. |
| D.By watching the video film made by the astronauts. |
Space travel is definitely bad for astronauts’ bones, reducing their bone density(密度) after only a month of weightlessness, according to French research published on Friday.
Laurence Vico and his fellow workers at St Etienne University called for more research into the effects of microgravity, after their study of 15 astronauts from the Russian MIR station showed bone loss continued throughout space flights.
“Bone loss was especially striking in four astronauts, ” the scientists reported in the Lancet Medical Journal.
They measured the bone mineral density (BMD) of bones in the forearm(前臂) and lower leg of the astronauts who had spent one to six months in space.
The BMD loss was significant in the tibia(胫骨) of the lower leg, a weight-bearing bone, but barely changed in the radius(桡骨) of the forearm. “Our results indicate the need to investigate not only different bones, but also different areas of the same bone since not all sites of the skeleton (骨架) are similarly affected by space conditions, ” they added.
Without gravity the body isn’t bearing any weight so there is no need for calcium (钙) which makes bones strong, and it becomes empty into the bloodstream.
The research team suggested in future scientists should try to determine if the loss of bone density was only on weight-bearing bones on longer flights, also the possible recovery after returning to Earth.
French scientists did their research on Russian astronauts, because _______.
A. they only cared for the Russian astronauts
B. they were not interested in their own astronauts
C. the Russian government invited them to do their research
D. the Russian astronauts worked in space for a long time
Scientists have found that _______.
A. the BMD loss may cause serious illness to astronauts
B. the BMD loss may cause some change in astronauts’ bodies
C. astronauts shouldn’t care about the BMD loss
D. astronauts should take some calcium before space travel
What cause the BMD loss to astronauts, according to this passage?
A. The food they eat in space. B. The drinks they take in space.
C. The temperature in space. D. The gravity in space.
In the third paragraph, the word “striking” means ______.
A. unusual B. simple C. weak D. slow
查看习题详情和答案>>Space travel is definitely bad for astronauts’ bones, reducing their bone density(密度) after only a month of weightlessness, according to French research published on Friday.
Laurence Vico and his fellow workers at St Etienne University called for more research into the effects of microgravity, after their study of 15 astronauts from the Russian MIR station showed bone loss continued throughout space flights.
“Bone loss was especially striking in four astronauts, ” the scientists reported in the Lancet Medical Journal.
They measured the bone mineral density (BMD) of bones in the forearm(前臂) and lower leg of the astronauts who had spent one to six months in space.
The BMD loss was significant in the tibia(胫骨) of the lower leg, a weight-bearing bone, but barely changed in the radius(桡骨) of the forearm. “Our results indicate the need to investigate not only different bones, but also different areas of the same bone since not all sites of the skeleton (骨架) are similarly affected by space conditions, ” they added.
Without gravity the body isn’t bearing any weight so there is no need for calcium (钙) which makes bones strong, and it becomes empty into the bloodstream.
The research team suggested in future scientists should try to determine if the loss of bone density was only on weight-bearing bones on longer flights, also the possible recovery after returning to Earth.
French scientists did their research on Russian astronauts, because _______.
A. they only cared for the Russian astronauts
B. they were not interested in their own astronauts
C. the Russian government invited them to do their research
D. the Russian astronauts worked in space for a long time
Scientists have found that _______.
A. the BMD loss may cause serious illness to astronauts
B. the BMD loss may cause some change in astronauts’ bodies
C. astronauts shouldn’t care about the BMD loss
D. astronauts should take some calcium before space travel
What cause the BMD loss to astronauts, according to this passage?
A. The food they eat in space. B. The drinks they take in space.
C. The temperature in space. D. The gravity in space.
In the third paragraph, the word “striking” means ______.
A. unusual B. simple C. weak D. slow
查看习题详情和答案>>Many people watched the lift-off of the space shuttle Columbia on March 21, 1982. But none watched more closely than eighteen-year-old Ted, as Ted’s insects were on board the shuttle.
The Shuttle Student Involvement Program invited students to make a science experiment. The experiment would be done by astronauts on the space shuttle.
Ted had always been interested in space and flight. Insect flight especially interested him. Ted noticed that insects need gravity to take off and land. They need gravity to fly in a straight line. But in space, there is no gravity. Could insects fly in zero gravity? That is what Ted wanted to find out.
Ted made an experiment called “Insect in Flight Motion Study”. He entered his experiment and soon news came that it was a winner.
A large team of scientists and engineers helped Ted get his experiment ready to fly. There were many questions to be answered first. What kind of insects would Ted use in his experiment? The insects would have to be strong enough to live on the shuttle for nine days without much food. What kind of container would hold the insects? Would the insects die during the shuttle flight?
After months of hard work, the “insectronauts” were chosen. A group of moths, flies, and honeybees were put into a special box and put onto the space shuttle. When Columbia flew into space, it was carrying insect passengers.
On March 24, astronauts Gordon Fullerton and Jack Lousma took out the box that held the insects. They began filming the insects with a special video camera.
When the space shuttle landed Ted was able to watch the video film of insects. Just as he thought, most of the insects did have trouble flying in zero gravity. The flies did well. But the moths’ flight seemed “uncontrolled”. They would often just hang in the air. The bees had the most trouble. They couldn’t fly at all! The film showed bees spinning around in all directions. Others were just floating about in the box.
Ted learned the answer to his question about insects’ flight in zero gravity. But he also learned a lot more. He learned about the hard work needed in making a successful experiment.
1.What does the underlined sentence “it was a winner” mean?
A.Ted could fly in space. B.Ted won a prize.
C.Ted’s experiment was accepted. D.Ted won in a race.
2.What did Ted want to find out?
A.Whether the insects could fly in space.
B.Whether the insects could fly in a straight line.
C.Whether the insects could land after flying for a while.
D.Whether the insects could take off after resting for a while.
3.Of the three kinds of insects sent into space, which one flew worst in zero gravity?
A.The flies. B.The honeybees. C.The insects. D.The moths.
4.Who did the experiment?
A.Ted himself.
B.Ted’s friend.
C.A large team of scientists and engineers.
D.Two astronauts on the space shuttle.
5.How did Ted learn the answer to his question about insects’ flight in zero gravity?
A.By asking the scientists and engineers.
B.By studying a book written by the astronauts.
C.By going into space and watching the insects’ flight himself.
D.By watching the video film made by the astronauts.
查看习题详情和答案>>
Space travel is definitely bad for astronauts’ bones, reducing their bone density(密度) after only a month of weightlessness, according to French research published on Friday.
Laurence Vico and his fellow workers at St Etienne University called for more research into the effects of microgravity, after their study of 15 astronauts from the Russian MIR station showed bone loss continued throughout space flights.
“Bone loss was especially striking in four astronauts, ” the scientists reported in the Lancet Medical Journal.
They measured the bone mineral density (BMD) of bones in the forearm(前臂) and lower leg of the astronauts who had spent one to six months in space.
The BMD loss was significant in the tibia(胫骨) of the lower leg, a weight-bearing bone, but barely changed in the radius(桡骨) of the forearm. “Our results indicate the need to investigate not only different bones, but also different areas of the same bone since not all sites of the skeleton (骨架) are similarly affected by space conditions, ” they added.
Without gravity the body isn’t bearing any weight so there is no need for calcium (钙) which makes bones strong, and it becomes empty into the bloodstream.
The research team suggested in future scientists should try to determine if the loss of bone density was only on weight-bearing bones on longer flights, also the possible recovery after returning to Earth.
1. French scientists did their research on Russian astronauts, because _______.
A. they only cared for the Russian astronauts
B. they were not interested in their own astronauts
C. the Russian government invited them to do their research
D. the Russian astronauts worked in space for a long time
2. Scientists have found that _______.
A. the BMD loss may cause serious illness to astronauts
B. the BMD loss may cause some change in astronauts’ bodies
C. astronauts shouldn’t care about the BMD loss
D. astronauts should take some calcium before space travel
3. What cause the BMD loss to astronauts, according to this passage?
A. The food they eat in space. B. The drinks they take in space.
C. The temperature in space. D. The gravity in space.
4. In the third paragraph, the word “striking” means ______.
A. unusual B. simple C. weak D. slow
查看习题详情和答案>>