题目

Dear Jane,How’s your summer vacation going？Are you studying hard, or are you having fun？I’m having a great time in Europe! My family and I are on a vacation in the mountains. I want to call you but my phone isn’t working, so I’m writing to you. It’s hot in your country now, isn’t it？The weather here is cool and cloudy, just right for walking.See you next month.Dave【1】Jane and Dave are spending their summer vacation.【2】Jane is having a great time in Europe.【3】Dave and his family are in the mountains.【4】Jane is writing to Dave.【5】It’s cool and cloudy in Eu如图，△A1B1C1是△ABC平移后得到的三角形，则△A1B1C1≌△ABC，理由是（    ）。