单项选择题

More off-shore scenic spots are __________ with the rapid development of transportation means.

A．available
B．convenient
C．achievable
D．accessible
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单项选择题
What can be inferred from the sentence Almost immediately it was clear that the primary mirror was misshapen—not to the extreme but enough to pull some lace curtains across Hubble's 'window on the universe'
A．There were some serious flaws in Hubble so that it couldn't work.
B．The mistake in the primary mirror led to incorrect views of the universe.
C．Hubble's mirror was rendered vague due to the lace curtains.
D．With some lace curtains, Hubble is like a window on the universe.
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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