logo - 刷刷题
下载APP
【简答题】

(答案没有标点符号)Some pathogenic bacteria live constantly in the body but cause no trouble unless there are changes in the body which lower its resistance, such as local irritation, fatigue, heat or cold, or hunger or thirst. 在这句里,双重否定结构是:

举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸