题目

第二节：读写任务（共1小题，满分25分） 阅读下面的短文，然后按照要求写一篇150词左右的英语短文。 For many years, scientists have warned that smoking tobacco is bad for health. Yet people around the world continue to smoke. The World Health Organization estimates that more than four million people die each year from the effects of smoking. That number is increasing. Scientists have identified more than forty chemicals in tobacco smoke that cause cancer in humans and animals. Nicotine (尼古丁) is the major poison in cigarettes that gives pleasure to smo在其他条件不变时，改变某一条件对A2(g)+3B2(g) 2AB3(g)化学平衡状态的影响，得到如右图所示的变化规律（T表示温度）。下列结论正确的是A．a、c两点A2的转化率相等 B．向a点的平衡体系中加入A2，可达到b点的平衡状态C．b点时，平衡体系中A、B原子数之比最接近于1:3D．正反应一定是吸热反应，且T2＞T1