读句子填空。 1. My father's father is my ________________. 2. My father's mother is my ________________. 3. My mother's father is my ________________. 4. My mother's mother is my ________________.
【简答题】利用附录 2 的数据,计算下面反应在 25 °C时的 。 (1) H 2 ( g ) + O 2 ( g )→ H 2 O ( g ) (2) CH 3 COOH ( l ) + 2O 2 ( g )→ 2CO 2 ( g ) +2H 2 O ( l ) (3) H 2 ( g ) + F 2 ( g )→ 2HF ( g )