单项选择题

According to the author, for common people the greatest achievement of Hubble is to__________.

A．help people look farther
B．help people migrate to the universe
C．evoke the same awe as an ancient temple
D．help people know the universe better
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单项选择题
Razor-sharp views of the space began to be sent back to the earth when__________.
A．Hubble was lifted into orbit in 1990
B．Hubble orbited the earth 370 miles up
C．replacement mirrors were installed by the crew of the shuttle Endeavor
D．some lace curtains were pulled across Hubble's "window on the universe"
单项选择题
According to the information given in Paragraph 5, we can conclude that the distance between the earth and the moon is approximately__________.
A．186,000 miles
B．372,000 miles
C．11 billion light years
D．2 billion light years
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