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).
计算（﹣a3）2的结果是（ ）
假定根毛细胞中细胞液浓度为25%，则细胞能吸收水分的土壤溶液浓度是（ ）
