A:H2、 I2、HI的浓度之比为1 : 1 : 2时
B:气体的总质量不再改变时
C:混合气体中各组分的含量不再改变时
D:单位时间内每消耗1 mol I2,同时有2 mol HI生成时
请以“你在我心里”为题写一篇作文。 要求:①文体自选。②字数不少于600字(诗歌不少于20行)。③文中不得出现真实地名、校名、人名。
方程组2x-y=3x+3y=5的解是( )
根据对话理解,选择最佳答案填空。
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B: Thank you 10!