题目

下列物质互为同分异构体的是(  ) A．11H2O和21H2O           B．甲烷和乙烷 C．石墨和C60           D．和CH3CH2CH2CH3 答案：D ________ everyone else wouldn’t go to the mountain area, he went without a second thought． [　　] A．As long as B．While C．Where D．In spite of