A:常温下,1 mol丁香酚只能与1 mol Br2反应
B:丁香酚不能与FeCl3溶液发生显色反应
C:1 mol香兰素最多能与3 mol氢气发生加成反应
D:香兰素分子中至少有12个原子共平面
—Are you sure this is a photo , the famous comedy actress?
—It surprised you, didn't it? But she was once really thin.
彩虹的美丽在于它的七色光彩,班级的美丽在于( )