请输入或粘贴题目内容
搜题
拍照、语音搜题，请扫码下载APP
题目内容
（请给出正确答案）
The author can’t remember his relatives clearly because ________.
A) he didn’t live very long with them
B) he was fully occupied with observing nature
C) he was too young when he lived with them
D) the family was extremely large
答案
更多“The author can’t remember his relatives clearly because ________.A) he didn’t live”相关的问题
第1题
Different Stages of Sleep
A scientist who has spent many years studying sleep was asked this question: "Why do we need sleep？" His answer was."If we do not sleep, we get very sleepy, "No one knows exactly why we sleep．But scientists have learned a lot．From．sleep experiments, scientists have [earned that there are four different stages 0f sleep;
When you first fall asleep, your heart starts to beat more slowly and your breathing slows down．If something wakes you, you might not think that you had been asleep．Some people call this kind of sleep dozing (打盹)．Scientists call it Stage 1 sleep.
Next, if you are no,t awakened, you drift into a deeper sleep．Your pu!se and breathing become even slower than they were during Stage 1 sleep．But you can still be awakened quite easily．If you take a catnap (小睡，打盹), you probably will not get any further than this stage of sleep, which is called Stage 2.
If you sleep longer than about twenty minutes, you go into the third stage of sleep.Your body is very relaxed．It would take a loud noise to wake you up.
You have probably heard of people who walk in their sleep．No one knows what
makes people sleepwalk (梦游)．But a person can sleepwalk only during Stage 4．This is the deepest kind of Sleep．I{ someone wakes you up during Stage 4, you might, feel very confused．It might take you a few minutes to get used to being awake.
After about ten minutes of Stage 4 sleep, you go back to Stage 3 and then to Stage 2.Then, something quite different begins.to happen．Your heartbeat becomes rapid．Your eyelids flutter (跳动), and your eyes move．This stage of sleep is called REM (rapid eye movement) sleep.
Most dreams happen during REM sleep． Scientists who study sleep often make noisesor talk to sleeping people in the REM stage．They are trying to find out what effects noises can have on dreams． As sleep research continues, scientists might also learn what causes dreams and how dreams might be helpful to people.
第 31 题 According to the author, why do we need sleep？
A．If we do not sleep, we get very sleepy.
B．Because there are four different stages of sleep.
C．No one knows the cause.
D．It is not mentioned in the article.
第2题
According to the author, how can the addicts get the money for drugs？
A．By borrowing from their families.
B．By hard working.
C．In an illegal way.
D．The author doesn't mention it.
第3题
According to the passage, the author may admit that ______.
A．fresh garbage can't provide as much information as ancient garbage does
B．only the author himself can benefit most from refuse studies
C．the studies of the Garbage Project are much better than any other research into the behaviors of consumers
D．the Garbage Project mainly deals with newly discarded refuse
第4题
What does the author suggest doing when we can't endure a job？
A．Changing to a new institute.
B．Asking senior colleagues for help.
C．Founding a sound social network.
D．Focusing more on positive outcomes.
第5题
From the passage we can infer that ______.
A．the author don't like tourism developing so fast
B．not enough tourism will decrease tourist attraction
C．other parts of a country’s economy won’t result from tourism much
D．we can't build too many support facilities
第6题
The author doesn’t seem to believe ________.
A) children will be on time if they have learnt how to tell time
B) a Flik Flak can help parents teach their children how to tell time
C) the Flik Flak can capture children’s imagination
D) children usually have trouble telling time if they don’t wear watches
第7题
Through which of the following can't unhappiness come according to the author？
A．Fear.
B．Vain.
C．Unlimited desires.
D．Natural desires.
第8题
What does the author imply about desert-adapted mammals？
A．They don't need to eat much food.
B．They never lose their appetite.
C．They can travel long distances looking for food.
D．They can eat large quantities quickly.
第9题
According to the author, how can the addicts get the money for drugs？
A．Borrow from their families.
B．By hard working.
C．In an illegal way.
D．The author doesn' t mention it.
第10题
What can be inferred from the author’s decision to go to Southpool？
A．He hadn’t been to the seaside before.
B．He thought he could probably get a job there.
C．He was looking forward to having tea by the sea.
D．He couldn’t afford to go any farther.
