在哪些情况下需增设专责监护人？
参考答案：
工作票签发人或工作负责人对有触电危险、施工复杂容易发生事故的工作，应增设专责监护人和确定被监护的人员。
They offered ________ prices for her paintings, which made her parents and teacher surprised but happy.[ ]
A. unbelievable
B. acceptable
C. agreeable
D. sociable
燃烧炉的尾气排放温度是850°C。
