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发布时间： 2021-12-21 07:58
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Researchers have found that REM (rapid eye movement) sleep is important to human beings. This type of sleep generally occurs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence. The deeper a person's sleep becomes, the longer the periods of rapid eye movement.
There are physical charges in the body to show that a person has changed from NREM (non-rapid eye movement) to REM sleep. Breathing becomes faster, the heart rate increases, and, as the name implies, the eyes begin to move quickly.
Accompanying these physical changes in the body is a very important characteristic of REM sleep. It is during REM sleep that a person dreams.
Which of the following is the best title of the article?（ ）
本题解析：
文章主要讲述了什么是REM sleep。
Researchers have found that REM (rapid eye movement) sleep is important to human beings. This type of sleep generally occurs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence. The deeper a person's sleep becomes, the longer the periods of rapid eye movement.
There are physical charges in the body to show that a person has changed from NREM (non-rapid eye movement) to REM sleep. Breathing becomes faster, the heart rate increases, and, as the name implies, the eyes begin to move quickly.
Accompanying these physical changes in the body is a very important characteristic of REM sleep. It is during REM sleep that a person dreams.
Which of the following shows that a person is NOT dreaming in his sleep?（ ）
本题解析：
参考文章第二段和第三段，人在睡眠的REM阶段会做梦，而呼吸加快、心率升高和眼球运动是人从NREM阶段转入REM阶段的标志。
Researchers have found that REM (rapid eye movement) sleep is important to human beings. This type of sleep generally occurs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence. The deeper a person's sleep becomes, the longer the periods of rapid eye movement.
There are physical charges in the body to show that a person has changed from NREM (non-rapid eye movement) to REM sleep. Breathing becomes faster, the heart rate increases, and, as the name implies, the eyes begin to move quickly.
Accompanying these physical changes in the body is a very important characteristic of REM sleep. It is during REM sleep that a person dreams.
The word “deeper” in Paragraph 1 is closest in meaning to “____”.（ ）
本题解析：
文中的deeper指“人睡得深，睡得沉”，可以用heavier代替。
Researchers have found that REM (rapid eye movement) sleep is important to human beings. This type of sleep generally occurs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence. The deeper a person's sleep becomes, the longer the periods of rapid eye movement.
There are physical charges in the body to show that a person has changed from NREM (non-rapid eye movement) to REM sleep. Breathing becomes faster, the heart rate increases, and, as the name implies, the eyes begin to move quickly.
Accompanying these physical changes in the body is a very important characteristic of REM sleep. It is during REM sleep that a person dreams.
According to the passage, how often does REM sleep occur in one night?（ ）
本题解析：
根据文章第一段第二句，可知REM一晚上发生四到五次。
Animals have different ways of protecting themselves against wintertime weather. Some animals grow heavy coats of fur or feathers, while others dig into the ground to find a warm wintertime home. Some animals spend the winter in a deep sleep because by going to sleep they avoid the time of the year when food is scarce and the temperatures are low. Their sleep is known as
There is much about hibernation that puzzles scientists. For example, they are wondering how hibernation came into being. Some scientists have explored the possibility that animals release a chemical that starts them hibernating.
One thing that scientists are certain about is that animals hibernate only when it is cold. Hibernation is a seasonal practice．
Some animals that fall into a winter time sleep are not true hibernators because they spend only a part of the cold season asleep. Bears, for example, can easily be awakened from their winter nap. They are not true hibernators.
Sometimes it is difficult to determine whether a particular animal is a true hibernator. For example, some mice hibernate, but others do not. The same is true of bats. Some of them hibernate. Others do not.
The theme of the passage is that ____.（ ）
本题解析：
文章首段引出讨论的对象“hibernation”，接着论述科学家对“hibernation”的疑惑之处，故全文主要讲的是科学家对“hibernation”的不解之处。故选C。
Animals have different ways of protecting themselves against wintertime weather. Some animals grow heavy coats of fur or feathers, while others dig into the ground to find a warm wintertime home. Some animals spend the winter in a deep sleep because by going to sleep they avoid the time of the year when food is scarce and the temperatures are low. Their sleep is known as
There is much about hibernation that puzzles scientists. For example, they are wondering how hibernation came into being. Some scientists have explored the possibility that animals release a chemical that starts them hibernating.
One thing that scientists are certain about is that animals hibernate only when it is cold. Hibernation is a seasonal practice．
Some animals that fall into a winter time sleep are not true hibernators because they spend only a part of the cold season asleep. Bears, for example, can easily be awakened from their winter nap. They are not true hibernators.
Sometimes it is difficult to determine whether a particular animal is a true hibernator. For example, some mice hibernate, but others do not. The same is true of bats. Some of them hibernate. Others do not.
The underlined word “hibernation” in Paragraph 1 means ____.（ ）
本题解析：
第一段倒数第二句是对“hibernation”的解释，即“hibernation”是冬天气温过低时动物所采取的通过睡眠的方式过冬的一种方法。C项符合题意，故选C。
Animals have different ways of protecting themselves against wintertime weather. Some animals grow heavy coats of fur or feathers, while others dig into the ground to find a warm wintertime home. Some animals spend the winter in a deep sleep because by going to sleep they avoid the time of the year when food is scarce and the temperatures are low. Their sleep is known as
There is much about hibernation that puzzles scientists. For example, they are wondering how hibernation came into being. Some scientists have explored the possibility that animals release a chemical that starts them hibernating.
One thing that scientists are certain about is that animals hibernate only when it is cold. Hibernation is a seasonal practice．
Some animals that fall into a winter time sleep are not true hibernators because they spend only a part of the cold season asleep. Bears, for example, can easily be awakened from their winter nap. They are not true hibernators.
Sometimes it is difficult to determine whether a particular animal is a true hibernator. For example, some mice hibernate, but others do not. The same is true of bats. Some of them hibernate. Others do not.
Some scientists believe that hibernation is started by ____.（ ）
本题解析：
由第二段最后一句Some scientists...animals release a chemical that starts them hibernating.可知，C项符合题意，故选C。
Animals have different ways of protecting themselves against wintertime weather. Some animals grow heavy coats of fur or feathers, while others dig into the ground to find a warm wintertime home. Some animals spend the winter in a deep sleep because by going to sleep they avoid the time of the year when food is scarce and the temperatures are low. Their sleep is known as
There is much about hibernation that puzzles scientists. For example, they are wondering how hibernation came into being. Some scientists have explored the possibility that animals release a chemical that starts them hibernating.
One thing that scientists are certain about is that animals hibernate only when it is cold. Hibernation is a seasonal practice．
Some animals that fall into a winter time sleep are not true hibernators because they spend only a part of the cold season asleep. Bears, for example, can easily be awakened from their winter nap. They are not true hibernators.
Sometimes it is difficult to determine whether a particular animal is a true hibernator. For example, some mice hibernate, but others do not. The same is true of bats. Some of them hibernate. Others do not.
Hibernation is a seasonal practice. This means it ____.（ ）
本题解析：
“hibernation”既然是一个“seasonal practice（季节性的做法）”，可以推测它可能仅发生在特定的季节。只有A项符合题意，故选A。
Advertisement can be thought of “as the means of making known in order to buy or sell goods or service”. Advertisement aims to increase people's awareness and arouse interest. It tries to inform and to persuade. The 说明:C:\Users\出版工~1\AppData\Local\Temp\1533286745(1).jpg are all used to spread the message. The press offers a fairly cheap method, and magazines are used to reach special sections of the market. The cinema and commercial radio are useful for local market. Television, although more expensive, can be very effective. Public notices are fairly cheap and more permanent in their power of attraction. Other ways of increasing consumers' interest are through exhibitions and trade fairs as well as direct mail advertisement.
There can be no doubt that the growth in advertisement is one of the most striking features of the Western World in this century. Many businesses such as those handling frozen foods, liquor, tobacco and medicines have been built up largely by advertisement.
We might ask whether the cost of advertisement is paid for by the producers or by the customers. Since every advertisement forms part of the cost of production, which has to be covered by the selling price, it is the customers who pay for advertisement. However, if large scale advertisement leads to increased demand, production costs are reduced, and the customers pay less.
It is difficult to measure exactly the influence of advertisement on increasing demand. When the market is shrinking, advertisement may prevent a bigger fall in sales than would occur without its support. What is clear is that businessmen would not pay large sums for advertisement if they were not convinced of its value to them.
From the last sentence of this passage we conclude that ____.（ ）
本题解析：
本文的最后一句大意是：如果商家不确信广告将带给他们更大的利润，他们就不会花大量的钱去拍广告了。由此可以推论出：商人确信广告将他们带来更大的利益。
Advertisement can be thought of “as the means of making known in order to buy or sell goods or service”. Advertisement aims to increase people's awareness and arouse interest. It tries to inform and to persuade. The 说明:C:\Users\出版工~1\AppData\Local\Temp\1533286745(1).jpg are all used to spread the message. The press offers a fairly cheap method, and magazines are used to reach special sections of the market. The cinema and commercial radio are useful for local market. Television, although more expensive, can be very effective. Public notices are fairly cheap and more permanent in their power of attraction. Other ways of increasing consumers' interest are through exhibitions and trade fairs as well as direct mail advertisement.
There can be no doubt that the growth in advertisement is one of the most striking features of the Western World in this century. Many businesses such as those handling frozen foods, liquor, tobacco and medicines have been built up largely by advertisement.
We might ask whether the cost of advertisement is paid for by the producers or by the customers. Since every advertisement forms part of the cost of production, which has to be covered by the selling price, it is the customers who pay for advertisement. However, if large scale advertisement leads to increased demand, production costs are reduced, and the customers pay less.
It is difficult to measure exactly the influence of advertisement on increasing demand. When the market is shrinking, advertisement may prevent a bigger fall in sales than would occur without its support. What is clear is that businessmen would not pay large sums for advertisement if they were not convinced of its value to them.
Advertisement is mainly paid for by ____.（ ）
本题解析：
根据第三段的强调句it is the customers who pay for advertisement可知，正是消费者为广告付费。
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