题目

阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出最佳选项。 On a cold winter evening, I waswalking home, tired and hungry, when suddenly came screams (呼喊声) frombehind some tress. 1, I slowed down to listen, and2thatwhat I was hearing were the sounds of a fight. A woman was being3notfar from where I stood. Should I go to helpher? I thought. I was worried about my own4,and I regretted having suddenly decided to take a new way home that night.What if I'm5too? Shouldn't I just6tothe nearest phone and call the police? But already the girl's7were 某温度下, 在一固定容积的容器中进行反应H2（g）+I2（g）2HI（g）, 下列情况一定能说明反应已达到平衡状态的是A．压强不再随时间而改变时B．气体的总质量不再改变时C．混合气体中各组成成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