组成多聚核苷酸的骨架成分是下列哪项
A．碱基与戊糖B．戊糖与磷酸C．碱基与碱基D．碱基与磷酸E．戊糖与戊糖
参考答案：B
We go to the movie theatre to ______________.[ ]
A. have supper
B. play a game
C. watch a movie
K-T气化法特点？
