汇率制度包括哪四个方面的内容？

One day a man found a cocoon(茧) of a butterfly in the forest. He sat there for several hours and watched the butterfly. Suddenly a small opening appeared, and the butterfly made its great effort to force its body through that little hole. Then it seemed to stop making any progress. It appeared as if it had gotten as far as it could and it could go no further.

So the man decided to help the butterfly. He cut off the remaining bit of the cocoon so that the butterfly could come out easily. But to his surprise, the butterfly got a heavy body and very small wings when it came out of the cocoon.

The man continued to watch the butterfly because he expected that the body would grow smaller at any moment and the wings would become larger and be able to fly. But neither happened! In fact, the butterfly spent the rest of its life crawling (爬) around with a heavy body and small wings. It was never able to fly.

The man was in his kindness, but he did not understand the nature rules. Before the butterfly came out of the cocoon, fluid(流体) from its body must be forced into its wings, and then it would be ready for flying. It must have a hard struggle (拼搏) to get through the small opening to get its freedom from the cocoon.

Sometimes struggles are exactly what we need in our life. If God allowed us to go through our life without any difficulties, it would make us fail. We would not be as strong as we could have been; we could never fly.

小题1:What was the butterfly doing at the beginning of the story ?

A．It was trying to make a cocoon for itself.

B．It was struggling to get out of its cocoon.

C．It was flying among the trees in the forest.

D．It was crawling around quietly on the ground.小题2:The man cut off the remaining bit of the cocoon

A．to take the butterfly home

B．to help the butterfly come out easily

C．to kill the butterfly

D．to stop the butterfly growing bigger小题3:What do you think of the man?

A．Patient but cruel.

B．Careful and wise.

C．Kind but unwise.

D．Brave and funny.小题4:What does the last paragraph（段落） tell us?

A．Struggles are sometimes necessary in our life.

B．Nothing is difficult if we put our heart into it.

C．Every good deed will come back with good result.

D．The greatest happiness in the world is to help others.小题5:What is the best title for the story?

A．The Love for the Cocoon.

B．The Joy of Helping Each Other.

C．The Lesson of the Cocoon.

D．The Expectation for the Butterfly.

2011年新年伊始就迎来了今年首次日食景观，2011年1月4日发生的日偏食于北京时间14 时40分，从非洲和欧洲西部开始，经非洲北部、欧洲大部、中东、中亚，19时1分在我国结束。我国只有部分地区可观测到程度不等的日偏食和。当日北京的日出时间约为7时20分。据材料回答1-2题 

1．与材料中的天文现象无关的天体系统是 [     ]

A．地月系        

B．太阳系        

C．银河系      

D．河外星系

2．关于材料中天文现象形成原因描述不正确的是 [     ]

A．与地球的自转有关                  

B．与地球公转有关

C．与太阳活动有关                    

D．与日、地、月位置关系变化有关

总氯是（）和（）的总称，又称为（）。

一次测验后，教师发现一年级学生在加减法运算中常有进位数加错、看错数字等现象，教师根据学生的错误进行补救与指导，这种测验属于( )。

A．安置性测验
B．形成性测验
C．诊断性测验
D．总结性测验

回首钱学森先生的一生，可算是生命不息，创新不止。他的物理力学就是将稀薄气体的物理、化学和力学特性结合起来的研究，主张从物质的微观规律确定其宏观力学特性，改变过去只靠实验测定力学性质的方法，并开拓了高温高压的新领域。可见，创新（）

A.是不崇拜任何东西，否定一切

B.是对既有理论、实践批判和发展

C.是几个事物相加成一个新的事物

D.是唯物辩证法的要求和本质