48.电源单元适应供电条件规定为？
["\u7b54\uff1a\u7535\u6e90\u5355\u5143\u9002\u5e94\u4f9b\u7535\u6761\u4ef6\u6700\u4f4e\u7535\u538b0.70Un\uff0c\u6700\u9ad8\u7535\u538b1.25Un\u3002"]
48.电源单元适应供电条件规定为？
["\u7b54\uff1a\u7535\u6e90\u5355\u5143\u9002\u5e94\u4f9b\u7535\u6761\u4ef6\u6700\u4f4e\u7535\u538b0.70Un\uff0c\u6700\u9ad8\u7535\u538b1.25Un\u3002"]