从某高处释放一粒小石子，经过1s从同一地点释放另一小石子，则它们落地之前，两石子之间的距离将（　　）

作为一位著名的科学家，在对待原子弹的研发上爱因斯坦表现出怎样的先见之明与历史的洞察力？

阅读理解

    My family is not very big. There are only three cats. I'm a white cat. My name is Snow White. My husband (丈夫) is a black cat. His name is Captain Black Cat. We have a pretty (漂亮的) daughter. Her name is Lily. She is black and white. She's two years old. We live a happy life.

    Every day we work hard to catch the mice (捉老鼠).  We help people live a happy life in this house.