题目

（2分）物理学全面介入生命科学，在两学科的交叉点上，产生了一系列重大成就，如_______的确定，_______的建立。 答案：DNA双螺旋结构，耗散结构理论He was looking at the picture ________ on the wall when he heard someone shouting “Look out!” ________ the top of his voice. [　　] A．hanged; onB．hanging; at C．hung; onD．hanged; at