3. GWD32-Q3 using the mirrors left on the lunar surface by the Apollo missions, mirrors allowing the Earth –Moon distance to be measured precisely by lasers, it has been determined by scientists that the moon is moving from the Earth at the almost imperceptible rate of thtee to four centimeters per year .
1) allowing the Earth -Moon distance to be measured precisely by lasers .it has been determined by scientists that the moon is moving 2) allowing that the Earth-moon distance can be measured precisely lasers, scientists have been able to determine that the moon is moving 3) that allow the Earth-Moon distance to be measured precisely by lasers ,it was determined byscientists that the lasers ,it was determined by scientists that the Moon is moving away 4) that allow that the Earth-Moon distance can be measured pre3cisely by lasers , scientisls were able to determine that the moon is moving away
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[此贴子已经被作者于2007-7-19 21:24:49编辑过] |