一列单项式:﹣x2,3x3,﹣5x4,7x5,…,按此规律排列,则第7个单项式为 ____。
句子配对。
①How heavy is Tom?____ A. There are 15.
②How old is he?____B. He is 15years old.
③How much is the robot?____C. He weighs 51kg.
④How many boys are there under the tree?____D. It's September 15th.
⑤When is your birthday?____E. It's ¥15.
一位母亲纪录了儿子3到9岁的身高数据(略),她根据这些数据建立的身高y(cm)与年龄x的回归模型为y∧=7.19x+73.93,用此模型预测孩子10岁时的身高,则有( )
这次起义诞生了第一支人民军队,并走出了多位共和国元帅。这次起义是( )