资产负债率越低，债权人的风险越小，债权的保障程度越高。( )

下面语句正确的是（ ）。

A．If x<3 * y And x>y Then y=x^3

B．If x<3 * y And x>y Then y=3x

C．If x<3 * y：x>y Then y=x^3

D．If x<3 * y And x>y Then y=x * * 3

多态性指的是

A．以任何方式调用一个虚函数

B．以任何方式调用一个纯虚函数

C．借助于指向对象的基类指针或引用调用一个虚函数

D．借助于指向对象的基类指针或引用调用一个纯虚函数

阅读理解。

     Parents should stop blaming themselves because there's not a lot they can do about it. I mean the

teenager problem. Whatever you do or however you choose to deal with it , at certain times a wonderful

reasonable and helpful child will turn into a terrible animal.

     I've seen friends deal with it in all kinds of different ways. One strict mother insisted that her son right

from a child, should stand up whenever anyone entered the room, open doors and shake hands like a

gentleman. I saw him last week when I called round. Sprawling himself (懒散地躺) on the sofa in full

length, he made no attempt to turn off the loud TV he was watching as I walked in , and his greeting

was no more than a quick glance at me . His mother was ashamed. " I don't know what to do with him

these days," she said. "He's forgotten all the manners we taught him."

     He hasn't forgotten them. He's just decided that he's not going to use them. She confessed(坦白) that

she would like to come up behind him and throw him down from the sofa onto the floor.

     Another good friend of mine let her two daughters climb all over the furniture, reach across the table,

stare at me and say ,"I don't like your dress, it's ugly." One of the daughters has recently been driven out

of school. The other has left home.

     "Where did we go wrong?" her parents are now very sad. Probably nowhere much. At least, no more

than the rest of that unfortunate race, parents.

1. This text is most probably written by_____.

A. a specialist in teenager studies    

B. a headmaster of a middle school

C. a parent with teenage children    

D. a doctor for mental health problems

2. The underlined word " it" in the second paragraph refers to ____.

A. the change from good to bad that's seen in a child

B. die way that parents often blame themselves

C. the opinion that a child has of his parents

D. the advice that parents want their children to follow

3. The boy on the sofa would most probably be described as ___.

A. lazy    

B. quiet    

C. unusual    

D. rude

4. From the second example we can infer that the parents of the two daughters___.

A. pay no attention to them        

B. are too busy to look after them

C. have come to hate them        

D. feel helpless to do much about them

5. What is the author's opinion about the sudden change in teenage children?

A. Parents have no choice but to try to accept it.

B. Parents should pay still more attention to the change.

C. Parents should work more closely with school teachers

D. Parents are at fault for the change in their children.  

社会经济的发展推动教育事业的发展，而教育事业的发展又反过来促进经济进一步发展。从因果关系来看，这属于（ ）

A．原因和结果相互区别

B．原因和结果相互依存

C．原因和结果相互渗透

D．原因和结果相互作用

股东财富最大化目标和经理追求的实际目标之间总存有差异，其差异源自于（）。