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                                                                                             大堰河，是我的保姆。
                                                                                             她的名字就是生她的村庄的名字，
                                                                                             她是童养媳，
                                                                                            大堰河，是我的保姆。
                                                                                            我是地主的儿子；
                                                                                            也是吃了大堰河的奶而长大了的
                                                                                            大堰河的儿子。
                                                                                            大堰河以养育我而养育她的家，
                                                                                            而我，是吃了你的奶而被养育了的，
                                                                                            大堰河啊，我的保姆。
                                                                                            大堰河，今天我看到了雪使我想起了你：
                                                                                            你的被雪压着的草盖的坟墓，
                                                                                            你的关闭了的故居檐头的枯死的瓦菲，
                                                                                            你的被典押了的一丈平方的园地，
                                                                                            你的门前的长了青苔的石椅，
                                                                                            大堰河，今天我看到了雪使我想起了你。

设D是正$△P_1{P}_2{P}_3$及其内部的点构成的集合，点P₀是$△P_1{P}_2{P}_3$的中心，若集合$S=\left\{P|P\in D,\left|P{P}_0\right|\le \left|P{P}_i\right|,i=1,2,3\right\}$.则集合S表示的平面区域是（     ）

19世纪末20世纪初中国出口商品分类比重（%）（    ）

分析图表能够说明中国近代