一、选择题(每题只有一个正确选项,请将各题正确选项缤入下表内.每小题2分,共40分)(A)由小变大(C)保持不变(B)由大到小(D)无法判断题号l23456789园答案口题号lll2l3{4巧16l7l8l9回答案口 1.下列变化中,前者属于物理变化,后者属于化学变化的是() (A)冰化成水,水变成水蒸气 (B)钢 First, multiple-choice questions (there is only one correct option for each question, please enter the correct options for each question in the table below. 2 points for each question, a total of 40 points) (A) change from small to large (C) remains unchanged (B) From large to small (D) can not determine the question number l23456789 garden answer locator number lll2l3 {4 qiao 16l7l8l9 back to the answer mouth 1. The following changes, the former belongs to the physical change, the latter belongs to the chemical change is () (A) ice into Water, water becomes water vapor (B) steel