题目

Indeed, (combine) forces with China in Afghanistan mighteven improve the relationship between Washington and Beijing. 答案：【1】combining下列变化属于化学变化的是（　　）A.剩余的饭菜变馊B.冰受热时融化为水C.冬天的窗户上生成霜花D.未及时盖上灯帽的酒精内的酒精变少