已知某单纯投资项目的计算期为10年，项目总投资为1500万元，其中原始投资1200万

已知两点P₁（4，9）和P₂（6，3），则以P₁P₂为直径的圆的方程是______．

阅读下面的语段，回答下面问题。

轻轻的我走了，

正如我轻轻的采：

我轻轻的招手，

作别西天的云彩。

那河畔的金柳，

是夕阳中的新娘；

波光里的艳影，

在我的心头荡漾。

软泥上的青荇，

油油的在水底招摇：

在康河的柔波里，

我甘心做一条水草！

那榆阴下的一潭．

不是清泉，是天上虹

揉碎在浮藻间，

沉淀着彩虹似的梦。

寻梦？撑一支长篙，

向青草更青处漫溯，

满载一船星辉，

在星辉斑斓里放歌。

但我不能放歌，

悄悄是别离的笙箫；

夏虫也为我沉默，

沉默是今晚的康桥！

悄悄的我走了，

正如我悄悄的来；

我挥一挥衣袖，

不带走一片云彩。

1．《再别康桥》的第一节三次用了“轻轻的”，第七节变为“悄悄的”，这个细微的变化蕴藏着什么深意？

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2．此诗写作者再别康桥，为何不见与母校师友话别的场面，而只是写母校景物呢？

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3．诗中描写的意象与诗人的情感是如何融在一起的？

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缓释氮肥

向航空公司提出索赔的应是分运单上填写的托运人或收货人。( )

The French word renaissance means rebirth. It was first used in 1855 by the historian Jules Michelet in his History of France，then adopted by historians of culture，by art historians，and eventually by music historians，all of whom applied it to European culture during the 150 years spanning 1450－1600.The concept of rebirth was appropriate to this period of European history because of the renewed interest in ancient Greek and Roman culture that began in Italy and then spread throughout Europe. Scholars and artists of the fifteenth and sixteenth centuries wanted to restore the learning and ideals of the classical civilizations of Greece and Rome. To these scholars this meant a return to human—as opposed to spiritual values. Fulfillment in life—as opposed to concern about an afterlife—became a desirable goal，and expressing the entire range of human emotions and enjoying the pleasures of the senses were no longer frowned(皱眉头) on. Artists and writers now turned to secular(不朽的)as well as religious subject matter and sought to make their works understandable and appealing.

These changes in outlook deeply affected the musical culture of the Renaissance period—how people thought about music as well as the way music was composed，experienced，discussed，and circulated. They could see the architectural monuments，sculptures(雕塑)，plays，and poems that were being rediscovered，but they could not actually hear ancient music—although they could read the writings of classical philosophers，poets，essayists，and music theorists that were becoming available in translation. They learned about the power of ancient music to move the listener and wondered why modern music did not have the same effect. For example，the influential religious leader Bernardino Cirillo expressed disappointment with the learned music of his time. He urged musicians to follow the example of the sculptors，painters，architects，and scholars who had rediscovered ancient art and literature.

The musical Renaissance in Europe was more a general cultural movement and state of mind than a specific set of musical techniques. Furthermore，music changed so rapidly during this century and a half—though at different rates in different countries—that we cannot define a single Renaissance style.

小题1:What is the passage mainly about?

A．The musical compositions that best illustrate the developments during the European Renaissance.

B．The musical techniques that were in use during the European Renaissance.

C．The European Renaissance as a cultural development that included changes in musical style.

D．The ancient Greek and Roman musical practices used during the European Renaissance.小题2:The underlined word “now” in Paragraph 1 refers to ________.

A．1855

B．the period of the Renaissance

C．the time of the classical civilizations of Greece and Rome

D．the time at which the author wrote the passage小题3:It can be inferred from the passage that thinkers of the Renaissance were seeking a rebirth of ________.

A．spirituality in everyday life

B．communication among artists across Europe

C．a cultural emphasis on human values

D．religious themes in art that would accompany the traditional secular themes小题4:What can be inferred about the music of ancient Greece and Rome?

A．Its effect on listeners was described in a number of classical texts.

B．It was played on instruments that are familiar to modern audiences.

C．It expressed more different ideals than classical sculpture，painting and poetry.

D．It had the same effect on Renaissance audiences as it had when originally performed.小题5:According to the passage，why was Bernardino Cirillo disappointed with the music of his time?

A．It did not contain enough religious themes.

B．It had little emotional impact on audiences.

C．It was not complex enough to appeal to musicians.

D．It was too dependent on the art and literature of his time.