l 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