根据统计图所提供的数据,计算出的甲、乙两种水稻苗高的平均数和方差分别是____、____;____、____.
It is on Sunday.My friends and I will go to the bookshop.I like reading____.It is interesting.Sue likes reading____books.Sam doesn't like reading books.He wants to buy a ____.So his subjects are very good.My grandparents like reading____every day.But my parents like reading____.They often read them in the evening.
·(1)| OA1→ |=| OA2→ |=| OA3→ |=…=| OAn→ |
·(2)| OAi→ |的最小值一定是| OB→ |
·(3)点A和点Ai一定共线
·(4)向量 OA→ 及 OAi→ 在向量 OB→ 方向上的投影必定相等
其中正确的个数是( )
缩句
①我呆呆地望着来来往往吊唁的人。
②凛冽的寒风无情地吹着光秃秃的小树。
例句:野花遍地是:杂样儿,有名字的,没名字的,散在草丛里,像眼睛,像星星,还眨呀眨的。
仿句:____