据报道，4月20日16：25左右，甘肃瓜州县一小学的学生正在开运动会．孩儿们欢快地奋力地在操场上奔跑着，拼搏着．就在这时，龙卷风突然刮来，道具、书包等物品在空中乱飞，校方立刻要求操场上的学童或坐或趴在地上或抓住固定物体等，尽量采用低姿势，孩儿们满脸惊恐．突然一名女童被龙卷风卷了进去并带向空中，目测至少离地4米，她掉下来之后立即被送往医院，但是并无大碍．据称，这多亏了她在下落的时候被龙卷风拖住了，才减缓了下落的速度！

请找出一个与以上情景有关的物理信息，并指出对应的物理知识．

物理信息：____；

物理知识：____．

判断  阅读下面的材料，判断下列句子是否符合短文内容。符合内容的选正确，不符合的选错误。

    Different people have different skin（皮肤）. Some have black skin. Some have yellow skin, and some have white skin. There was a woman in Alaska. Her skin was orange. It was almost the color of orange juice.

    How did her skin become orange? She ate lots of tomatoes, carrots, and squashes (南瓜). She ate too many orange things. That's why her skin turned orange.

    The woman didn't want her skin to be orange, so she went to see the doctor. The doctor said. “Stop eating orange things. Eat some green things.” The woman did so, and her skin wasn't orange any more.

体积相同、pH均等于1的盐酸和CH₃COOH溶液，分别加水稀释m倍、n倍，溶液的pH都变成3，则m与n的关系为____ ．

今年是世界反法西斯胜利70周年，下列关于二战的表述不正确的是（    ）

如图，直线a，b被c所截，a∥b，若∠1＝35°，则∠2的大小为（    ）