题目

阅读理解 After shopping for dealsin stores on Black Friday, or online on Cyber Monday, Americansand people worldwide are preparing for newly popular Giving Tuesday.Starting in 2012, now the global event that is celebrated annually on the Tuesdayafter Thanksgiving is the brainchild of 92nd Street Y, a cultural centerin New York City and the United Nations Foundation. As the name indicates, GivingTuesday is meant to restart the charitable season and therefore observed byraising funds for local nonprofits and schools, organizing food and clothing drives,and conducting random acts of kindness.如图所示,用同位素32P、35S分别标记噬菌体的DNA和大肠杆菌的氨基酸,然后进行“噬菌体侵染细菌的实验”,侵染后产生的子代噬菌体和母噬菌体形态完全相同,而子代噬菌体的DNA分子和蛋白质分子应含有的标记元素是(   )A.31P、32P和32SB.31P、32P和35SC.31P、32P和32S、35SD.32P和32S、35S
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