生产事故
参考答案：
由于违反工艺操作规程、规定和岗位操作法，指挥错误，以及停水、停电、停汽、停风造成停（减）产、跑料、串料的事故。
具有清热燥湿、退虚热除蒸、解毒疗疮功效的药物是（）。
A.银柴胡
B.苦参
C.黄芩
D.黄连
E.黄柏
Beijing a lot in the past ten years. Now it has become one of the biggest modern in the world. [ ]
A. changes; cities
B. changed; city
C. has changed; cities
D. has changed; city
