在每个小正方形的边长均为1的7×7网格图中,格点上有A,B,C,D,E五个定点,如图所示,一个动点P从点E出发,绕点A逆时针旋转90°,之后该动点继续绕点B,C,D逆时针90°后回到初始位置,点P运转路线的总长是____.(结果保留π)
决定元素种类的是原子的( )
根据句意及首字母提示完成单词
(1)I was b____ in a small town.
(2) —What’s your teacher like? —She is s____ with us.
(3)The students are all from the same p____ school.
(4)We should be____(友好的)to our friends.
(5)There are three hotels in this____(城镇).
下面句中没有错别字的一项是( )