为测定某碳素钢样品中铁的质量分数，现取一定质量的样品粉末于质量为52.2g的烧杯中，然后缓慢加入一定质量的稀硫酸，当加稀硫酸质量为85g时，反应恰好完全（杂质不反应且产生的气体全部逸出），反应过程中的质量关系如图．完成下列问题：

下列有关美国内战的叙述， 不正确的是（  ）

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   Betty is an American school girl. She is very happy because her parents will take her to China for a visit. They are going to fly from New York on June 30 and get to Beijing on July 1. They will stay at Lido Holiday Inn. Their Chinese friends will show them around Beijing. They are going to visit the Palace Museum, the Summer Palace, the Temple of Heaven and the Great Wall. They will also visit some Chinese homes and try some Chinese food. They will spend a week in Beijing and then go to Xi’an, Guilin and some other places for sightseeing. The whole trip will take three weeks and she is sure she will have a great time in China.