生活中，常用水做冷却剂，是因为水的____；冬天下雪后，常在桥面上洒一些盐，这是因为加盐后，水的凝固点会____；在锅中隔水蒸菜，打开锅盖时，看见锅中的水在沸腾，但浮在水上的碗中的水没有沸腾，这是因为____．

图中A曲线表示男性睾丸发育趋势，B曲线表示女性卵巢发育趋势．下列图示信息正确的是（  ）

    It was a Monday morning. When a teacher walked into the1, he heard a low voice: “Here is the teacher. I am 2this boring fellow(烦人的家伙) is going to talk about putting in commas(逗号).” It was a boy's3. His name was Bill. He was talking4the boy next to him. The teacher didn't get angry. He said5about it, then he really began to talk about putting in commas, and then he wrote6the sentence: “Bill says the teacher is a boring fellow.” The class7and Bill's face8red. “Now,” said the teacher, “I'll 9you how important commas are.”

    He put two commas in the sentence, and now read, “10is a boring fellow.”

①水在天然循环过程中实现了水的自身净化

②水的天然循环是通过水的三态变化实现的

③太阳为水的天然循环提供了能量

④水的天然循环完成了水资源的重新分配