题目

   A thief entered the bedroom of the 30th President of the United States, who met him and helped him escape punishment．  The event happened in the early morning hours in one of the first days when Calvin Coolidge came into power, late in August, 1923．He and his family were living in the same third-floor suite (套房) at the Willard Hotel in Washington that they had occupied several years before．The former President’s wife was still living in the White House．    Coolidge awoke to see a stranger go through his clothes, remove a wallet and a watch chain．  Coolidge spok不同生物含有的核酸种类不同。下列各种生物中关于碱基、核苷酸、五碳糖种类的描述，正确的是                                               ABCD 烟草花叶病毒烟草叶肉细胞噬菌体豌豆根毛细胞碱基5种5种4种8种核苷酸5种8种8种8种五碳糖1种2种2种2种