下列句子标点符号使用正确的一项是( )
A：既然大自然赐予我们无比高贵的大脑，为何不带着希望，登上峰顶，去迎接朝阳呢？
B：乌鲁木齐的大街上到处摆着水果摊，甜瓜啊、西瓜啊、伊犁苹果啊、库尔勒香梨啊……走到哪儿都闻得见诱人的香味儿。
C：自然美有两种：“骏马秋风冀北”，这是阳刚美。“杏花春雨江南”，这是阴柔美。
D：长江流域—珠江流域各自都有天然的泄水湖，那里不宜搞什么“围湖造田”——尽管这样做有其善良的愿望。
函数f（x）=log2（ax2﹣x﹣2a）在区间（﹣∞，﹣1）上是单调减函数，则实数a的取值范围是____．
It's Sunday morning. There are many people in the park, some boys are playing basketball. There are some girls under a big tree. They're singing and dancing. What are those women doing? They are drinking tea. Look at the woman in a blue coat. Who's she? She's my mother. She is talking to Edward. Edward is her student. He is a good student. He studies hard. He's good at all the subjects. And he's friendly to all his teachers and his friends.
