单项选择题

The searchers used NOT to believe______.

A．other stars may have the planets resembling those going around the sun
B．planet forms owing to the gas and dust in star formation
C．the formation of star is subsequent to that of planet
D．star is formed by the collapsing interstellar cloud

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热门试题

单项选择题

What do the remarks of Tremaine mean at the end of the passage

A．The overturn of the present study fruit may betoken new breakthroughs.
B．If we want to achieve something original, we must throw away the old.
C．The fruits available in each field couldn't hold water all the way.
D．It is always exciting experience to discard the old and obtain the new.

单项选择题

What is NOT the finding of searchers in these years

A．A solar system with a usual planet and an unusually huge one.
B．Gassy extra-solar planet careering about its star in short distance.
C．Huge planet orbiting in peculiar track with great gravity.
D．Solar system and Planet Earth are peculiar cosmic balls.