2023国考1号语文答案

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短文改错I'm now studying in German for my university education.When I first arrive in the country,I felt a bitofGermanyarrivednervous and lonely.However,I knew I had to be open and friendly.This is whatever I've done since I movedwhathere and I've made many great friend along the way.friendsNext week a friend of mine is moved to Spain for the next part of my study.I'm concerned about her asmovinghershe'll have to start a new life in another new country.To say goodbye to her,I've made adecide to hold adecision

4.青花瓷是中华陶瓷烧制工艺的珍品，也是中国瓷器的主流品种之一.已知某青花瓷花瓶的外形上下对称，可看成是焦点在x轴上的双曲线的一部分绕其虚轴旋转所形成的曲面，如图所示若该花瓶的瓶口直径是8，瓶身最小的直径是4，瓶高是6，则该双曲线的标准方程是Ay=1x2y2=13B.4x2y2C.8=19【答案】B【解析】由题意可知该双曲线的焦点在x轴上，实轴长为4，点(4,3)在该双曲线上.设该双曲线的方程为2a=4,若-1a>0,b>0,则3262-1解得a=26=5,故演双由线的标准方程是-号-1