题干

若点P是曲线 y=
3
2
x22lnx
上任意一点,则点P到直线 y=x
5
2
的距离的最小值为(   )

A:2

B:332

C:322

D:5

上一题 下一题 0.0难度 选择题 更新时间:2012-12-21 08:12:09

答案(点此获取答案解析)

C

同类题4

任务型阅读

How can I fight laziness?

    Lazy people will never amount to anything in life. However, laziness can be defeated once a few changes have been made in your mind.

    ____Many people lack sleep constantly, since they stay up too late and get up too early to prepare for work. These people have little motivation once they arrive home. Laziness works hand in hand with a lack of motivation and a tendency to put off things. By adjusting your sleep schedule to provide a few more hours of meaningful rest, you can fight laziness throughout the day.

    Another way to fight laziness is to change your mind from passive to active. Some people treat their lives as if they were pushed from task to task. Others take a more proactive approach, viewing each task as a challenge they must overcome alone.____

    Some people fight laziness by removing the temptations that surround them. A television in the living room may provide entertainment, but watching too much TV often contributes to laziness. Create a reward system for yourself, just as parents do for a child to promote responsibility.____

    ____Spouses and children may all have different energy levels, but laziness can be spread if not dealt with immediately. To fight household laziness, lead by example. Be the first to collect and wash dishes after a meal. Others in the home may eventually follow your example and perform their own task. It is difficult to practice laziness when your are surrounded by motivated people.

    ____Enough exercise and a balanced diet can help you to develop a healthy lifestyle, thus enabling you to have more energy and help lift your spirits.

A. Knowing how to fight laziness is important.

B. One way to fight laziness is to get enough sleep.

C. Laziness can also be a lasting problem at home.

D. Complete a few tasks and reward yourself with what you enjoy, such as a good dinner or a film.

E. Finally, taking exercise regularly can help you fight laziness.

F. With strong determination, you will be able to achieve your goal.

G. Laziness sets in when you no longer feel in charge of your own life.

同类题5

任务型阅读

    We've all heard about the power of our attitude, and it's our attitude that determines how much we succeed in life.

    All the things that you have been through, all the people you have met and interacted with can have an impact on your attitude. If you think that all these factors have molded you into a person with a poor attitude towards life, there is no need to worry.____

1).Identify and understand what you want to change.

    The first step towards change is clearly understanding what needs to be changed.____When it comes to changing your attitude, you need to do an honest and in-depth self-evaluation so you could point out exactly which of your traits need to be improved or totally changed.

2).____

    Find someone who has the kind of attitude that you want to have, and let his or her life give you inspiration and encouragement to move beyond your temporary failures in your journey towards becoming a better person.

3). Choose the right company.

    As they say, “Bad company corrupts good character.” You don't expect yourself to be able to change if you go on surrounding yourself with people who possess all the negative traits that you want to change. Consider befriending new people, especially those who are optimistic and have a healthy attitude towards life.____

4). Believe that you are able to change.

    ____ If you don't believe in yourself or believe that you or your life can change, it just won't happen—you will either never start, or give up quickly that you won't have even given yourself the opportunity to succeed.

A. Your effort to change will be easier with these people as friends.

B. Setting clear goals is the key to success in any endeavor.

C. The greatest obstacle is our inability to trust in what we can do.

D. Look for a role model.

E. Think about how your attitude change will affect your life.

F. There is always an opportunity for change.

G. Fix your mind on the things that would come as a result of your attitude change.