如图，在菱形ABCD中，DE⊥AB，cosA＝$\frac{3}{5}$，BE=2，则tan∠DBE的值（　　）

    Are you satisfied with your life? How often do you think of reasons why everyone around you is successful though they are not usually better than you? What do you do wrong? Here are some things you should stop doing to be successful.

1） ____

    Different people may interpret “success” in different ways: some of them measure it in money, other ones — in positive changes to people around them and the world.____ And do not worry about what other people think, and come after what makes you happy.

2）Do not believe anything without questioning it.

    ____ They are critical thinkers, and they understand that we are all ruled by our prejudices; so, they will always question new information.

3）Do not worry about all unpredictable things that may happen to you.

    If you want to be successful, stop thinking about everything that MAY happen to you.____ Be ready to change your deeds and decisions when things suddenly don't go according to your plan.

4）Do not care about what other people think of you.

    ____ Your attempts to become “good” for everyone will turn into nothing but new worries, stresses, and problems. Successful people do not concentrate on quantity of people to please, but worry about their quality and focus on developing friendships with people they really care about.

Success is good, but you should understand that life will get depressing without friendship and love.

A. Try to feel comfortable with the reality and accept the fact your future can't be predicted.

B. Do not let others decide what “success” is for you.

C. As far as we all know, it's impossible to please all the people who surround us.

D. Do not wait for the “right time” to do anything.

E. Successful people never ignore or avoid problems, no matter how big and awful they seem.

F. Successful people do not just accept any new information to be true.

G. If you want to be successful, do not let others force their interpretation of success on you.

阅读下列内容, 从每小题所给的 A、B、C、D 四个选项中选择一个最佳答案。

Who is the greatest teacher in Chinese history? Many people would think of Confucius(孔子), whose birthday was September 28. Although he lived over 2, 000 years ago, people still remember and respect him for his contribution(贡献) to the education today.

Confucius lived in the Kingdom of Lu, which lies in Shandong Province. He lived during the Spring and Autumn Period. He had a hard childhood. His father died when he was only 3. His mother brought him up. As a child, he had to work to help his mother, but young Confucius didn't give up studying. He visited many famous teachers and learned music, history, poetry and sports.

Later, he became a teacher and started the first public school in Chinese history. At that time only children from noble families could go to school, but Confucius believed everyone should go to school if they wanted to learn. He had about 3, 000 students in his lifetime.

Today, people still follow Confucius' lessons. He told us that we all have something worthy to be learned. “When I am with three people, one of them must be better than me in some areas. I choose their good qualities and follow them.”

He also taught us that thinking is very important in study. “All study but no thinking makes people puzzled (困惑的). All thinking but no study makes people lazy.” Confucius is not only a great teacher, but also a famous thinker with wise thoughts about the world and society. His most important teachings are about kindness and good manners. “A person should be strict with himself, but be kind to others.” he said.

下图为三国曹魏《三体石经》的残片，经文中的每个字均用先秦古文、小篆等三种字体刻写。这三种字体反映了（   ）