依据华电集团《工作票和操作票管理使用规定(试行)》,工作许可人的安全职责是什么?
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硅铁冶炼的基本反应,是利用铁质还原剂中的铁将硅石中二氧化硅中的硅还原出来的反应。
A. 正确
B. 错误
中国近现代学前教育理论流派的特点是学习借鉴(),探索()的学前教育理论。
The equipment required to remove an on-deck oil spill on a barge transfering oil must either be arried on board or().
A. on a tug standing by
B. available by contract with the shore facility
C. kept at the shoreside hose connection during transfer
D. kept in a protected shoreside location readily accessible
CRH5型动车组备用制动手柄(D02)有哪几个位臵?动车组正常运行时应将手柄臵于什么位臵?