阅读下面一首诗，完成下面题目。
                                                                                                                               无 题
                                                                                                                               李商隐
                                                                                                      相见时难别亦难，东风无力百花残。
                                                                                                      春蚕到死丝方尽，蜡炬成灰泪始干。
                                                                                                      晓镜但愁云鬓改，夜吟应觉月光寒。
                                                                                                       蓬山此去无多路，青鸟殷勤为探看。

一般来说，各地区的文化与当地的自然条件，民族风俗等有着密切的关系。读亚洲两地区的住房、服饰图，回答下面小题。

三视图均相同的几何体是（　　）

9的平方根是（　　）