小红参加数学口算比赛,结果做对了85题,做错了15题,小红这次口算的正确率是____.
给下面图片配上相应的单词,选择字母编号填入。A. cleaning the house B. magazine C. bridge D. nurse E. scarf ____ ____ ____ ____ ____
命题“∀x∈R,cosx≤1”的否定是 ( )
In winter, it's _______.