题目

Mother's Day is a holiday for mothers. People celebrate it in the United States, England,India and some other countries. Little by little, people in many other countries also celebrate it. Mother's Day is on the 2nd Sunday in May. On that day, many people give presents of love to their mothers. If their mothers are alive(活着)，they often wear a pink or red rose（玫瑰）or carnation(康乃馨)．If their mothers are dead(去世)，they wear a white one.The celebration of the first American Mother's Day was held(被举行)in Philadelphia(费城)on May 10, 1908. Soon the holiday became pop下列关于实验现象的描述，不正确的是（ ）A．红磷在氧气中燃烧产生大量的白烟B．将二氧化碳通入紫色石蕊溶液中，溶液变红色C．硫在氧气中燃烧发出蓝紫色火焰D．铁丝在空气中剧烈燃烧，火星四射