新中国的一切权力属于人民，各级人民代表大会是人民行使这一权力机关。在第一届全国人民代表大会召开前，实际上执行我国最高权力的是

下面四幅图是来自于同一生物体内的、处于四个不同状态的细胞分裂图．下列有关叙述中，正确的是（　　）

 k____t____

阅读理解。

    Amy and Sarah are good friends. They are from America. They like winter in America because there are many activities in winter. They can make a snowman,go fishing and go skiing with many friends. There are two festivals (节目) in winter. They're Christmas Day and Thanksgiving. Amy and Sarah are very happy. But they're in Beijing now. They like winter in Beijing, too. Because It's beautiful. It's windy and cold. They're going to visit the Great Wall, so they're very happy.