题目

Recently I read the Human Development Report．I couldn't help thinking about another problem why the world is facing hunger．According to the report，2400 people are dying from hunger every day；nearly 13 million in southern Africa will be worried about their food supply because of earthquakes，floods or wars． In a word，hunger remains the biggest problem of the world today．It's strange to see that man can travel to the moon，but still doesn't know how to feed himself．You may ask，“Who steals our bread？”The first thieves should be population growth，poverty and l在北方的冬季，常见的几种物态变化现象中，属于凝华的是（　　）A．室外冻冰的衣服变干B．房间窗户玻璃的内表面出现冰花C．湖面结了厚厚的一层冰D．正在跑步的人，口中呼出“白气”