试题详情

Mercury’s（ ）is so much greater than the Earth’s that it completes more than four revolutions around the Sun in the time it takes the Earth to complete one.

A选项意为“速度，速率”；B选项意为“轨道，活动范围”；C选项意为“重量，重要性，影响力”；D选项意为“直径，（透镜等的）倍率”。根据题意答案为A。