A-A+ means that there is a need for servicemen to k 2022-08-01 21:14:30 问答库 阅读 167 次 问题详情 means that there is a need for servicemen to keep it running properly. __5__People are earning higher wages and salaries. 参考答案 将it改为them【解析】them指代appliances，为复数，故不能使用it。
