Nuclear power’s danger to health, safety, and even life itself can be summed up in one word: radiation.
Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It can’t be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can’t detect them, sense them, without a radio receiver. Similarly, we can’t sense radio activity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.
At very high levels, radiation can kill an animal or human being outright by killing masses of cells in vital organs. But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit. And if they are killed outright, your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in a deformed way. They can grow into cancer. Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the victim being aware at the time that damage has occurred. A person can he irradiated and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents.
Radiation can hurt us. We must know the truth.
According to the passage, the danger of nuclear power lies in______.

A:nuclear mystery B:radiation detection C:radiation level D:nuclear radiation

Nuclear power’s danger to health, safety, and even life itself can be summed up in one word: radiation.
Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It can’t be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can’t detect them, sense them, without a radio receiver. Similarly, we can’t sense radio activity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.
At very high levels, radiation can kill an animal or human being outright by killing masses of cells in vital organs. But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit. And if they are killed outright, your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in a deformed way. They can grow into cancer. Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the victim being aware at the time that damage has occurred. A person can he irradiated and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents.
Radiation can hurt us. We must know the truth.

A:nuclear mystery B:radiation detection C:radiation level D:nuclear radiation

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them—and, like all mammals, originated on land. There are many (1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (2) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (4) of eight knots (节).An angry whale will (5) a ship. A famous example of this was the fate of whaler Essex, (6) was sunk off the coast of South America early in the last century. More recently, steel ships have (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.
The greatest (8) of whales is their diving ability. The sperm whale dives to the bottom for his (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the (10) is 1,400 pounds, to a square inch. Doing so he will (11) underwater long as one hour. Two special skills are involved in this: storing up enough (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not (13) . It is believed that some of the oxygen is stored in a special (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that (15) adjusts the internal pressure of his body. But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work.

A:interest B:job C:danger D:mystery

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive, sucking them-and, like all mammals, originated on land. There are many (51) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.
Immense strength is (52) into the great body of the big whales, and in fact most of a whale’s body is one gigantic muscle. The blue whale’s pulling strength has been estimated (53) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the (54) of eight knots (节).

A:interest B:job C:danger D:mystery

阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从 4个选项中选择1个最佳答案。

A:interest B:job C:danger D:mystery

The Greatest Mystery Of Whales The whale is a warm-blooded，air-breathing animal，giving birth to its young alive，sucking them--and，like all mammals，originated on land．There are many front flippers(鳍状肢)，used for steering and stability, are traces of feet． __________ . (51)of this．Its Immense strength is __________ . (52)into the great body of the big whales，and in fact most of a whale’s body is one gigantic muscle．The blue whale’s pulling strength has been estimated __________ . (53)400 horsepower．One specimen was reported to have towed(拖)a whaling vessel for seven hours at the __________. (54) of eight knot (节). An angry whale will __________ . (55) A famous example of this was the fate of Whaler Essex, __________ . (56)was sunk off the coast of South America early in the last century．More recently, steel ships have __________ . (57)their plates buckled(使弯曲)in the same way．Sperm whales(抹香鲸)were known to seize the old-time whaleboats in their jaws and crush Them. The greatest __________ . (58)of whales is their diving ability．The sperm whale dives to the Bottom for his __________ . (59)food，the octopus(章鱼)．In that search he is known to go as far Down as 3,200 feet, where the． __________ . (60)is 1,400 pounds，to a square inch．Doing so he Will __________ . (61)underwater long as one hour．Two special skills are involved in this storing up enough __________. (62)(all whales are air—breathed)and tolerating the great change in pressure．Just how he does it scientists have not __________ . (63)．It is believed that some of the oxygen is stored in a special __________ . (64)of blood vessels，rather than just held in the lungs．And it is believed that a special kind of oil in his head is some sort of compensating mechanism that __________ . (65)adjusts the internal pressure of his body．But since you can’t bring a live whale into the laboratory for study, no one knows just how these things work．

A:interest B:job C:danger D:mystery

{{B}}第三篇{{/B}}

A:nuclear mystery B:radiation detection C:nuclear radiation D:radiation level