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．Howcosmic dark agescame 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 theastronomical objectin paragraph 2 refer to?

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