2022衡水金卷先享题·信息卷 理综（二）答案 全国乙卷

2022衡水金卷先享题·信息卷 理综（二）答案 全国乙卷，目前衡水金卷答案网已经汇总了2022衡水金卷先享题·信息卷 理综（二）答案 全国乙卷的各科答案和试卷，更多衡水金卷答案请关注本网站。

Passage 5When the earthquake was happened in 2008 my auntwas still a little girl in A small county in Sichuan. Todayashe can wel remember doctors and nurses in whiteovcrallhiwere busy day and night savc thewho/thatsavinginured in our hometown. It was then when she made uher mind to be someone like them. Her drcam came trulyfter she graduated from a local medical school. On1rJanuary 2020, when bad news came that Hubei was badlyin need of doctors and nurses to fight COVID-19, sheapplied to be there to help out but her application wasapproved. Before she leaves, she told us she was gratefuleltfor what people did for us after the earthquake and thatshe had decided to pay them forward.

25.解:(1)粒子的运动轨迹如图所示,设粒子在磁场中做匀速圆周运动的半径为r,有quB=my(2分)由几何关系有r2=dF+(r-yd)2(2分)解得B=5".(2分)(2)由几何关系有OD=tan-34(2分)设粒子在电场中做类平抛运动的加速度大小为a、时间为t,有gE=m(2分)ODos=w(2分)ODin 6=at2(2分)解得E-25m.(1分)