2022年全国高考甲卷数学(理)试题变式题13-16题原题131.设向量a ,b 地夹角地余弦值为13,且1a = ,3b =r ,则()2a b b +⋅= _________.变式题1基础2.设,a b 为单位向量,且,a b 地夹角为23π,则()·a b b +v v v 地值为_________.变式题2基础3.已知向量1
2023年12月23日发(作者:wrap) 高考英语二轮复习新高考题型组合练(八) 基础篇15 阅读理解A、B篇+七选五+语法填空+应用文写作 【阅读理解A篇】 A (2022·北大附中期中) When I was 12 years old, I already knew that my teen years were going to be the worst years of my li
2023年12月19日发(作者:mercury是什么意思)激情的重要性(The importance of passion) What does passion mean to us? Passion is the seasoning source of your tedious life and so you savor your experience. Passion is the drive
2023年12月18日发(作者:肝癌初期三处痒)24 Solar Terms: 8 things you may not know about Frost's Descent 24节气:关于霜降你可能不知道的8件事 The traditional Chinese lunar calendar divides the year into 24 solar terms. Frost's Descent