题目

Back in the 15th century, in a tiny village in Germany, lived a family with eighteen children．Eighteen! In order  36   to keep food on the table, the father, a goldsmith by profession worked almost eighteen hours____37__ day at his trade．Despite their seemingly   38   condition, two of the eldest children had a dream．They both wanted to pursue their talent for art.  39  , they knew well that their father would never be able to  40   either of them to study at the Academy．After many long discussions at night in their  41   bed, the two boys finally worked out a pact．The下列关于经线或纬线的叙述，正确的是（　　）A. 连接南北两极的线叫纬线 B. 所有的经线都是长度相等的半圆C. 所有纬线的长度都相等 D. 纬线指示南北方向，经线指示东西方向