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提问人：网友zdp_10
发布时间：2022-01-07
[主观题]
An object can have zero velocity and nonzero acceleration at the same time.
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A、had learnt
B、will learn
C、have learnt
D、can learn
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更多“An object can have zero velocity and nonzero acceleration at the same time.”相关的问题
第2题
5.Object 1 has twice the mass of Object 2. Both objects have the same kinetic energy. Which of the following statements is true？
A、Both objects can have the same magnitude of momentum.
B、Object 1 has a momentum of greater magnitude than Object 2.
C、The magnitude of the momentum of Object 2 is four times that of Object 1.
D、All the statements are false.
E、All the statements are true.
第3题
Which of the following topics can be chosen when preparing a self-introduction speech？
A、a very special skill you have developed
B、your lifestyle
C、your hobby or interest in your spare time
D、an object that means a lot to you
第4题
Object 1 has twice the mass of Object 2. Each of the objects has the same magnitude of momentum. Which of the following statements is true？
A、Both objects can have the same kinetic energy.
B、One object has 0.707 times the kinetic energy of the other.
C、One object has twice the kinetic energy of the other.
D、One object has 4 times the kinetic energy of the other.
E、None of the others.
第5题
Which of the following italicized parts is used as an object？A．He wants to tell us when he
Which of the following italicized parts is used as an object？
A．He wants to tell us when he will leave.
B．It has been decided when the meeting will be held.
C．What I want to know is when you can finish the experiment.
D．I have no idea when she will be back.
第6题
Question5: The Fastest Way to Recompile All Stored Procedures I have a problem with a dat
Question5: The Fastest Way to Recompile All Stored Procedures
I have a problem with a database running in SQL Server 6.5 (Service Pack
4). We moved the database (object transfer) from one machine to another last
night, and an error (specific to a stored procedure) is cropping up. However, I
can't tell which procedure is causing it. Permissions are granted in all of our
stored procedures; is there a way from the isql utility to force all stored
procedures to recompile？
Tips: sp_recompile can recomplie a store procedure each time
第7题
When we see well, we do not think about our eyes very often. It is only when we cannot see
perfectly that we realize how important our eyes are.
点击查看答案
People who are nearsighted can only see things that are very close to their eyes. Everything else is not so clear. Many people who do a lot of close work, such as writing, reading and sewing, become near sighted. Then they have to wear glasses in order to see distant (远处的) things clearly'.
People who are nearsighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses, too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle (角度). To prove this to yourself, look at an object out of one eye; then look at the same object out
of the other eye. You will find the object's relation to the background (背景) and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
We should take good care of our eyes ______.
A．only when we cannot see perfectly
B．only when we can see well
C．even if we can see well
D．only when we realize how important our eyes are
第8题
When we see well, we do not think about our eyes very often. It is only when we cannot see
perfectly that we realize how important our eyes are.
点击查看答案
People who are near-sighted can only see things that are very close to their eyes.' Everything else is not so clear. Many people who do a lot of close work, such as writing, reading and sewing, become near sighted. Then they have to wear glasses in order to see distant (远处的) things clearly.
People who are far-sighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses, too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them."
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle (角度). To prove this to yourself, look at an object out of one eye; then look at the same object out of the other eye. You will find the object's relation to the background (背景) and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
We should take good care of our eyes ______.
A．only when we cannot see perfectly
B．only when we can see well
C．even if we can see well
D．only when we realize how important our eyes are
第9题
When we see well, we do not think about our eyes very often. （79) It is only when we canno
When we see well, we do not think about our eyes very often. (79) It is only when we cannot see perfectly that we realize how important our eyes are.
People who are nearsighted can only see things that are very close to their eyes. Everything else seems blurry (模糊的). Many people who do a lot of close work, such as writing, reading and sewing, become nearsighted. Then they have to wear glasses in order to see distant objects clearly.
People who are farsighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses, too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people olden became blind. Now, however, it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle. To prove this to yourself, look at object out of one eye; then look at the same object out of your other eye. You will find the object's relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
We should take good care of our eyes ______.
A．only when we can see well
B．only when we cannot see perfectly
C．even if we can see dell
D．only when we realize how important our eyes are
第10题
Passage Two When we see well, we do not think about our eyes very often. It is only w
Passage Two
When we see well, we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.
People who are nearsighted can only see things that are very close to their eyes. Everything else is not so clear. Many people who do a lot of close work, such as writing, reading and sewing, become near sighted. Then they have to wear glasses in order to see distant (远处的) things clearly'.
People who are nearsighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses, too.
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.
Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle (角度). To prove this to yourself, look at an object out of one eye; then look at the same object out
of the other eye. You will find the object's relation to the background (背景) and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes.
40. We should take good care of our eyes ______.
A. only when we cannot see perfectly
B. only when we can see well
C. even if we can see well
D. only when we realize how important our eyes are
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