Responding to the public’s fascination with-and sometimesundue alarm over-possible threats from asteroids, a scaledeveloped by astronomers rates the likelihood that a particular asteroid or comet may collide with Earth. A.a scale developed by astronomers rates the likelihoodthat a particular asteroid or comet may B.a scale that astronomers have developed rates howlikely it is for a particular asteroid or comet to C.astronomers have developed a scale to rate how likelya particular asteroid or comet will be to D.astronomers have developed a scale for rating thelikelihood that a particular asteroid or comet will E.astronomers have developed a scale that rates thelikelihood of a particular asteroid or comet that may 是C? -- by 会员 chengshaopu (2010/9/23 20:03:36)
D吧 |