青春是流动的小溪，是盛开的花朵。如何度过这美好的青春时光，下列说法不正确的是（    ）

阅读短文, 选出正确答案。

（A）

   A picture is on my desk. It is a picture of Mary's family. The man is her father Mr. White. He is a doctor. A woman is behind Mary. She is her mother. She's a teacher. A boy is in the picture, too. He is Mary's brother, Sam. Mary and Sam are in the same school. But they aren't in the same grade. They look like their mother. The White family are English. They come from London.

下列各项中不属于腔肠动物特征的是（　　）

北美洲的人口约占全球的5%，二氧化碳排放量却超过25%。其原因之一就是庞大的用电需求，大量燃烧煤等燃料发电。这与北美洲的哪项区域特征关系密切（    ）