题干

北京航天飞行控制中心采用高精度动力学模型和多种数据源融合的短弧段定规方法,实现了神舟九号飞行精准、对接精准。借助模型和数据源融合获取有关方法,实现飞行精准、对接精准,这反映了(    )
①科学实验提高了人们改造自然的活动水平 ②获得认识和改造世界是实践活动的目的
③一种认识可以源于几种认识的结合    ④模型实验和数据源融合是对接精准的前提条件

A:①③

B:②④

C:①④

D:②③

上一题 下一题 0.0难度 选择题 更新时间:2020-03-13 11:43:20

答案(点此获取答案解析)

C

同类题2

完形填空

                                                                                                                Hungry for Home

     If my life were a1, I would fast-forward through senior high. My senior years were 2. Like every junior high kid, I was3 with who I was and how I would4 in life.

     I tried and failed in a number of things I wanted to excel in sports but had not yet5that would never happen. I remember being 6 by most of my peers and being cut from the basketball team and7 to play football. To be loved and accepted seemed to me at the time something I could never,8 , achieve.

     During that time I went through the cafeteria line and ate alone, feeling unloved and 9One day I 10 that I had no one to eat with. Mom said to me, "If you want, you can come home for 11 ." As soon as the bell 12 at noon and I left the school and ran home that day my mom sat across the13 for about 15 minutes and looked at me and listened to me and three 14 later I still remember those times with 15. She just paid attention to me.

     I now know that I didn't need my 16 filled as much as I needed my emotional fuel tank refilled. I just needed a17 place of warm acceptance for a few minutes a day. Now you know a little more about how I18 home.

Home is a place where you don't have to 19 alone and eat. Home is a place where people don't20 you and avoid you.