Miss Wang: Hello, Helen. You look worried.____ ?
Helen: It’s Li Hong. She’s so unhappy.
Miss Wang: Oh dear! ____ . What seems to be the problem?
Helen: She is crying in the bathroom because she did badly in the English exam .She is very strict with herself. You know, Li hong is new here . She is quiet and shy. She feels very lonely because she has no friends to talk with. ____ .
Miss Wang: ____ . I think I should have a talk with her.
Helen: Oh, yes, Miss Wang.____ .

人工合成的植物激素类似物常用于生产实践，某课题组研究了激素类似物甲和激素类似物乙对微型月季生根的影响，据图分析，正确的是（           ）

已知三角形两边长分别为2和9，第三边的长为二次方程x²-14x+48=0的一根，则这个三角形的周长为(   )