题目

.He_______his million and found different way to be happy in his life.   A.turned his back to   B.turned back on  C.turned backs on   D.turned his back on 答案：D下列反应属于吸热反应的是A．炭燃烧生成一氧化碳B．酸碱中和反应C．锌粒与稀H2SO4反应制取H2D．Ba(OH)2·8H2O与NH4Cl反应