题目

恒温恒容下，向2L密闭容器中加入MgSO4和CO(g)，发生反应：MgSO4(s)+CO(g)MgO(s)+CO2(g)+SO2(g)，反应过程中测定的部分数据见下表：反应时间/minn(MgSO4)/moln(CO)/moln(CO2)/mol02.002.0002 0.80 4 1.20 下列说法正确的是A. 反应在0~2min内的平均速率为v(SO2)＝0.6mol·L-1·min-1B. 反应在2~4min内容器内气体的密度没有变化C. 若升高温度，反应的平衡常数变为1.00，则正反应为放热反应D. 保持其他条件不变，起始时向容器中充入1.00molMgSO4和1.00molCO，到达平衡时n(CO2)>0.60mol1．请根据以下提示，并结合事例，用英语写一篇短文．Everyone hopes to succeed overnight，but we should be aware that"a journey of a thousand miles begins with the first step．"注意：1、无须写标题，不得照抄英语提示语；2、除诗歌外，文体不限；3、内容必须结合你生活中的一个事例；4、文中不得透露个人姓名和学校名称；5、词数不少于120个，如引用提示语则不计入总词数．With competition becoming increasingly fierce，everyone dreams about succeeding overnight，but success may be a long process，in which you must work hard step by step．（高分句型一）Here is an experience that deeply impressed me．Three years ago，when I came to the high school，I was poor in English．I wanted to conquer it in a short time but I failed just because of the lack of a solid foundation．Helped by my teacher，I decidedto start rom the beginning，attaching importance to standard pronunciation，basic vocabulary and practical grammar．（高分句型二）Moreover，I made it a rule to recite five sentences each day．Then，the longer I learnt，the more progress I made．Now what I'm proud of is that I've won a prize in English Talent Competition．Judging from the experience，I firmlybelieve that on the wayto success，there are no lifts or elevators but steps and stairs．（高分句型三）．