Their simulation of the birth of a protostar in the early universe signifies a key step toward theambitious goal of piecing together the formation of an entire primordial star and of predicting the massand properties of these first stars of the universe.More powerful computers，more physical data，andan even larger range will be needed for further calculations and simulations，but these researchers hope to eventually extend this simulation to the point of nuclear reaction in.itiation-when a stellar ob. ject becomes a true star.

　　"Dr.Yoshida has taken the study of primordial star formation to a new level with this simulation，but it still gets us only to the halfway point towards our final goal.It is like laying the foundation of a skyscraper，"said Volker Bromm，Assistant Professor of Astronomy at the University of Tex. as，Austin and the author of a companion article."We must continue our studies in this area to un-derstand how the initially tiny protostar grows，layer by layer，to eventually form a massive star.Buthere，the physics become much more complicated and even more computational resources are needed."

　　31.According to the first two paragraphs，the early universe_______.

　　A.was governed by simpler physics

　　B.got fewer stars shinning in it

　　C.started over 13 billion years ago

　　D.was composed in a way similar to that of today

　　32.What can the state-of-the.art computer simulation tell us about？

　　A.How the Big Bang occurred about 13 billion years ago.

　　B.How"cosmic dark ages"came into existence.

　　C.How dust grains and gases were formed after the Big Bang.

　　D.How the first stars canle into being after the Big Bang.

　　33.What does the"astronomical object"in paragraph 2 refer to？

　　A.cosmic dark ages.

　　B.dust grains and gases.

　　C.a protostar.

　　D.the early universe.

　　34.According to paragraph 4，what is NOT true about a protostar？

　　A.It developed into a massive star during the Big Bang.

　　B.It evolved from pre-stellar gases.

　　C.It was able to integrate heavy elements when evolving into a massive star.

　　D.It had a mass of one percent of the sun.

　　35.According to the last paragraph，all of the following are goals of the simulation project EXCEPT

　　A.to know more about the mass and properties of the first stars of the universe

　　B.to simulate the process of how the early universe began

　　C.to apply the simulation to the study of nuclear reaction initiation

　　D.to discover the truth about the formation of a protostar

　　第二篇

　　The Iceman

　　On a September，day in 1991，two Germans were climbing the mountain between Austra and Ita. 1y.High up on a mountain pass，they found the body of a man lying on the ice.At that height （10，499 feet，or 3，200 meters），the ice is usually permanent，but 1991 had been an especially

　　warm year.The mountain ice had melted more than iust usual and so the body had come to the surface.It was lying face downward.The skeleton（骨架）was in perfect condition except a wound on the head.remains of some clothes.The hands were still holding the wooden handle of an ax and on the feet there were very simple leather and cloth boots.Nearby was a pair of gloves made of tree bark （树皮）and a holder for arrows.

　　Who was the man？How and when had he died？Everybody had a different answer to these questions.Some people thought that it was from this century，perhaps the body of a soldier who died in World War I，since several soldiers had already been found in this area.A Swiss woman who believed it might be her father，who had died in th