人类的皮肤含有黑色素，皮肤中黑色素的多少由两对独立遗传的基因（A和a、B和b）所控制，显性基因A和B可以使黑色素量增加，两者增加的量相等，并且可以累加。一个基因型为AaBb的男性与一个基因型为AaBB的女性结婚，下列关于其子女皮肤颜色深浅的描述中，错误的是（  ）

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    Yesterday evening，when l went to town with my  1  ，we met a strange old man．It was raining ham and we had no  2 ．We were trying to get into a taxi when he came up to us．He was 3  a nice umbrella and he said that he would give it to us for only a pound．He had forgotten his   4 ，he said，needed taxi—fares(出租汽车费)to go back home．My mother didn't believe  5 he had said at first，and asked him a lot of questions．Finally we bought it and he left  6 ．We followed him and found he went into a pub(小酒店)and  7  himself a glass of whiskey(威士忌)with the pound．

8 he drank it，he put 9   his hat and took up one of the many wet umbrellas at the entrance and went off．Soon after that，he sold it again．What a(n) 10  experience I had !

占全球人口20％的发达国家占世界GDP的86％、世界出口市场的82％、；而占全球人口75％的南方仅占全球GDP的14％和出口市场的18％。占世界人口20％的最贫穷的南方国家，只占上述领域的1％。这说明全球发展的最突出问题是（   ）