小明用重垂线检查墙壁上的画是否挂正利用了重力的方向始终是____ 的；大气压强随着高度的增加而____ （选填“增大”、“减小”或“不变”）；如图所示，铁块长度为____ 　cm．

关于君主与百姓的关系，中国古代史上的思想家们多有论述。孟子认为君权的获得依赖于天命和民心两方面，董仲舒主张“天子受命于天，天下受命于天子”，黄宗羲则主张“天下为主，君为客”。对上述材料理解不正确的是

郑和的船队最远到达（    ）

    One day after school I was just finishing up some math homework. My dad came back from work and sat right beside me1over my homework with me. We made corrections 2 After that we3and my dad said,＂ I will always4every moment spending time talking with you.＂

    I remember my Dad telling me his stories of when he was 5My dad didn't have a father6He was always moving from place to place with my 7My dad wasn't the easiest kid to 8He would 9with kids at school, which made my grandma worried. He'd act out to release the anger he had from not having his father present in his10and teenage years.

    At high school, things got a little 11 He made a football team, he did well and didn't get into as much 12as before. He also made many friends13those friends was my uncle. My Dad and Uncle were friends all throughout high school. It was through my uncle14my Mom and Dad met15Later, they got married. After I was born, my dad felt that becoming a 16was an honor and that he would not be17in my life.

    I suddenly looked up to see my Dad18at me. I could see in my Dad's eyes how he longed for a19 like this. I continued to do my math homework and20my Dad say,＂ I love you, always.＂