在筹资突破点范围内筹资，原来的资本成本率不会改变；超过筹资突破点筹集资金，维持现有的

关于边际成本曲线与各类平均成本曲线的关系，表述不正确的是（）。

A.当平均总成本曲线下降时，边际成本必定小于平均总成本

B.当平均总成本曲线上升时，边际成本必定小于平均总成本

C.在相交于最低点前，边际成本曲线低于平均可变成本曲线

D.当边际成本与平均总成本正好相等时，平均总成本处于最低点

下列运算正确的是（　　）

A．x²+x³=x⁵

B．x⁸÷x²=x⁴

C．3x-2x=1

D．（x²）³=x⁶

Could you be a genius like Einstein? A genius needs to learn and think. Reading is a good idea, but it is not enough. Einstein’s advice is to use your brain more. Here are some tips:

l Ask. When you look at new things, ask why they are new or different. Ask more questions. Ask yourself and others. Keep thinking until you find the answers.

l Draw. Einstein thought in pictures. Sometimes, it helps to draw problems and ideas.

l Read. Try to read new things. Read books from different parts of the library. After you read, think about the ideas you have learned. Are they different from what you thought?

l Relax. Many ideas come when you are relaxed. Take some time to relax yourself in the ways like taking a walk in a park, going to a concert or a museum.

l Write. Keep a diary. Write down your questions and ideas. Write down new ideas after you read.

l Share. Einstein used to talk to his friends and explain his ideas. Sometimes, a friend can help you find the answer to a problem.

l Be brave. Do not let other people say your ideas are silly. Explain yourself. Let other people explain why they think you are wrong. Then decide.

小题1:What can we do to relax ourselves according to the passage?

A．Keeping a diary.

B．asking questions.

C．Taking a walk.

D．Reading mew things.小题2:The author suggested we should    if other people say our ideas are silly.

A．discuss the ideas with others

B．draw problems and ideas

C．go to a museum with others

D．write down your ideas小题3:Which of the following is NOT TRUE according to the passage?

A．A genius needs to learn and think.

B．We should find the answers all by ourselves.

C．Einstein’s advice is to use our brain more.

D．Einstein liked to talk to his friends and explain his ideas.

何谓奇经八脉

债务成本估价方法主要有（）。

A.到期收益率法

B.可比公司法

C.风险调整法

D.财务比率法