答案(点此获取答案解析)
30,\u7535\u80fd\u8868\u6b63\u5e38\u5de5\u4f5c\u65f6\u7684\u7535\u538b\u662f220V\uff08\u6216\uff1a\u7535\u80fd\u8868\u5e73\u65f6\u5141\u8bb8\u901a\u8fc7\u7684\u6700\u5927\u7535\u6d41\u662f20A\u3001\u7535\u8def\u6d88\u80171kW\u2022h\u7535\u80fd\uff0c\u7