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Responding to the public's fascination with and sometimes undue alarm over-possible threats from asteroids, a scale developed by astronomers rates the likelihood that a particular asteroid or comet may collide with Earth.
C astronomers have developed a scale to rate how likely a particular asteroid or comet will be to
E as tronomers have developed a scale that rates the likelihood of a particular asteroild or comet that may
答案是C, 有大牛可以解释下吗?
The particular desgin of muscles and bones in the neck and limbs of the turtle allow that it can draw in its exposed parts such that an attacker can find nothing but hard shell to bite.
D allows that it can draw in its exposed parts, and so
E allow it to draw in its exposed parts, so that
答案是D, 请教大牛!
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