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Radiation can hurt us in the way that it can______.
A．kill large numbers of cells in main organs so as to cause death immediately
B．damage cells which may grow into cancer years later
C．affect the healthy growth of our offspring
D．all of the above
答案
更多“Radiation can hurt us in the way that it can______.A．kill large numbers of cells in main o”相关的问题
第1题
Radiation can hurt us in that it can ______.
A．affect the healthy growth of our offspring
B．damage cells which may grow into cancer years later
C．kill large numbers of cells in main organs so as to cause death immediately
D．all of the above
第2题
A．Cancer can be passed on to the next generation.
B．Senior citizens are more vulnerable to the hurt of radiation.
C．The impact of radiation can be accessible over generations.
D．Scientists have found out solutions to radiation.
第3题
Which of the following can be inferred from the passage？
[A] Cancer can be passed on to the next generation.
[B] Senior citizens are more vulnerable to the hurt of radiation.
[C] The impact of radiation can be accessible over generations.
[D] Scientists have found out solutions to radiation.
第4题
Which of the following can be inferred from the passage？
A．Cancer can be passed on to the next generation.
B．Senior citizens are more vulnerable to the hurt of radiation.
C．The impact of radiation can be accessible over generations.
D．Scientists have found out solutions to radiation.
第5题
听力原文： Nuclear reaction is no longer an alien concept for us. It can not be detected by human senses. We cannot see or touch it. Radiation is similar with radio waves. Radio waves can not be sensed without a radio receiver. Radioactivity can not be sensed without a radiation detector. On the other side, there is a big difference between radio waves and radiation. Radiation is harmful to people's health and other living things. Radiation at high levels can even kill living things by killing masses of cells in important organs before people know the damage in their bodies. No level of radiation is completely safe. If the cells are badly hit by radiations of low levels, die dead cells will be replaced by the healthy cells in your body. But if the cells are killed by high levels of radiation, the cells may produce themselves in an unusually way, and these cells may become cancerous. This is the origin of our increased risk in cancer, as a result of radiation exposure.
We have studied radiation for nearly 100 years now. We know radiation does lots of damage. The hurt can be passed on from generation to generation. A child can be born very weak or easy to get serious illness as a result of radiation absorbed by its grandparents. Nowadays, the scientists have been exploring new ways to deal with the radiation. They are trying to find out ways to prevent the damage of radiation to human being's health. To thoroughly solve the problem of radiation, more effort still needs to be taken.
Questions:
17. Why does the speaker say that radiation is similar to radio waves？
18. According to the passage, why does the cancer increase？
19. Which of the following is true according to the passage？
20. Which of the following can be inferred from the passage？
(17)
A．Because both of them can be detected by human senses.
B．Because both of them can be sensed by a radio receiver.
C．Because both of them are harmful.
D．Because both of them can only be detected by devices.
第6题
(Passage 2, Lines 1-2, Para. 5)
Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged;
第7题
阅读材料，回答题。
Alpha Particle
From decaying radon （氡） atoms can destroy the living cells they strike and increase the likelihood that those cells will later become cancerous.Researchers have now directly demonstrated that neighboring cells not suffering direct hits can be harmed， too. They"ve also taken a step toward showing how this type of radiation，called alpha particles， indirectly hurts those bystanders.
Radon derives from the decay of uranium （铀） and seeps naturally into the air from the ground.lt"s the primary environmental source of alpha particles， which contribute to cancer risk by causing aberrations （失常）in DNA.Alpha particles from inhaled radon are second only to smoking as a cause of lung cancer.
Because a person"s exposure to alpha particles typically is low， researchers have had to estimate public health threats from radon by guess from the effects of higher doses of alpha radiation.Such data comes primarily from studies of survivors of the atomic bombs that destroyed Hiroshima and Nagasaki in Japan. The customary extrapolation （推测 ） assumes that cancer risk is proportional to the dose of radiation even at low doses.
Radiation"s effects in cell structure don"t necessarily reflect what happens in "a whole organism， with its full range of defense repair mechanisms， " says Duport.Processes such as DNA repair and cell death triggered by radiation damage could cancel the effect on by stander cells observed in the lab， he suggests.
Furthermore， while a bystander effect can contribute to cancer， other cell-to-cell interactions in living tissue "may relieve increased risk." says Barry Michael， a radiation biophysicist at the Gray Cancer Institute in Northwood， England.One of these interactions halts cell division and hence cancer. "The jury is still out on whether cell-to-cell effects lead to a greater or lower risk， " Michael says.
The passage‘s main topic is__________. 查看材料
A.The experiment done by researchers
B.Uranium is the key killer of neighboring cells
C.Cell-to-cell interaction can make up for the hurt cells
D.Bystander cells can be indirectly damaged by alpha particles
第9题
Which of the following is true according to the passage？
[A] Radiation at low levels is harmless.
[B] Radiation produces cells in a strange way.
[C] Radiation can lead to cancer.
[D] Radiation's damage is obvious.
第10题
Why can't people on earth be harmed by radiation？
A．We are too far away from any harm.
B．We can protect ourselves.
C．There is part of the atmosphere protecting us.
D．There is special layers on our skin.
