题型:问答题 简答题 ._______ US newspaper reported, that from next autumn, ________ new computer system will follow the progress of international students at their schools in the USA.A. 不填; a B. The; the C. A; a D. A; 不填 查看答案
题型:问答题 简答题 防护电器的设置参数应满足()。A.额定电流不应小于回路的计算负载电流B.整定电流不应大于回路的计算负载电流C.额定电流不应小于回路的允许持续载流量D.整定电流不应大于回路的允许持续载流量E.保证防护电器有效动作的电流不应大于回路载流量的1.45倍 查看答案