题目

   On the River Thames there are a number of boat races every year and these have become very popular with the public. Perhaps the best – known of these races is the University Boat Race. This takes place just before Easter（复活节）every year and is a competition between teams from the Universities of Oxford and Cambridge. They row from Putney to Mertlake, a distance of about four and a quarter miles. This race has been taking place almost every year since 1829. 31、The best – known of these races is __________. A．the Boat Race of the University of Oxford. B．the Boat R二次函数y=ax2+b与一次函数y=ax+b（a＞b）在同一个直角坐标系的图像为 [     ]A、B、C、D、