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可能用到的原子量:Fe-56Zn-65Mg-24Cu-64Al-27O-16S-32C-12H-1Cl-35.5K-39Ag-108N-14一、选择题:(每小题只有一个正确答案,每小题2分,共30分)1.下列变化属于物理变化的是A.酚酞试液在碱溶液中变红色B.氧气在-183℃时变为淡蓝色液体C.灼热的光亮的红包
Possible atomic weight: Fe-56Zn-65Mg-24Cu-64Al-27O-16S-32C-12H-1Cl-35.5K-39Ag-108N-14 First, multiple-choice questions: (There is only one correct answer for each question, each 2 points for a total of 30 points. The following changes are physical changes are A. The phenolphthalein test solution turns red in the alkali solution. Oxygen becomes light blue liquid at -183°C. Hot glowing red envelope