题目

A huge 42 percent of marriages in the UK end in divorce, the highest rate in Europe. What is happening in the UK to cause such a phenomenon? Many consider the family to be the basic building block of society. If marriages and families are falling apart, is the UK society also falling apart? Is the UKs cultural identity breaking down? The UK of today is one of the most multicultural countries on earth. There are exotic sights and sounds on the street corners of every British city. British cuisine is now one of the most diverse around. Everyone speaks with a different accent.Is such diversity a 下图为某幼苗受单侧光照射后，尖端以下部位纵切示意图，其中圆点表示生长素。下列叙述错误的是A. 此部位的生长素来自幼苗尖端B. b侧生长素浓度高，故单侧光来自b侧C. a侧细胞的伸长速度小于b侧D. a侧的生长素效应相当于茎横放的远地侧