题目

第三部分 阅读理解（共20小题；每小题2分, 满分40分） 阅读下列短文, 从每题所给的四个选项（A、B、C和D）中, 选出最佳选项。 A While researchers have long shown that tall people earn more than their shorter counterparts, it's not only social discrimination that accounts for this inequality -- tall people are just smarter than their height-challenged peers, a new study finds. As early as age three -- before schooling has had a chance to play a role -- and throughout childhood, taller children perform significantly better on cognitive tests, wrote Anne在数轴上表示到原点的距离为1的数是﹙    ﹚．