阅读短文，判断正误。

    During the summer holiday, my grandparents went to China. First they flew to Beijing from London.Then they went to Guangzhou by train.

    When they went to my home, I wanted to help my grandpa carry his heavy bag, but he did himself.  They bought many presents for us. I got a dress. My brother got a toy plane. They brought many dried fruits for us, which they grew by themselves. My grandparents are farmers. They are hard-working people.

在我国历代文学宝库中，歌颂祖国壮丽河山的作品可谓浩如烟海，后人可以从各不相同的描述中，区分出特定的环境来：“天苍苍，野茫茫，风吹草低见牛羊。”讴歌的是辽阔海洋的北国草原；“日出江花红胜火，春来江水绿如蓝”，描绘的是风景绮丽的江南春色。这种现象表明（    ）

①不同的地理环境的矛盾具有各自的特殊性

②意识活动的能动性可以创造不同自然景象

③发挥主观能动性在认识世界中起决定作用

④具体问题具体分析是正确认识事物的基础

下列细胞既含有同源染色体，又含染色单体的是　①减数第一次分裂后期　  ②减数第二次分裂后期　③有丝分裂后期　④有丝分裂中期　⑤减数第一次分裂中期　⑥减数第二次分裂中期