2017考研英语大纲已经发布了，考生可安心备考，新东方在线提醒考生一定要背好大纲涉及核心词汇，最好结合真题句子来理解记忆，下面是A开头的，大家收藏!多背多巩固。
2017考研英语大纲核心词汇：B
bang (突发的) sudden loud bang
bar 条，块，杆，棒 a bar of gold
bare 赤裸的，光秃的，空无内容的 walk in bare feet
beforehand 预先，事先 If you wanted soup for lunch you should have told me beforehand.
behave 举止端正，听话 Do behave.
bewilder 使迷惑，使糊涂 I’m bewildered as to which one to buy.
bias 偏见，偏心 have a bias against sb.(或 sth.)
blame 责备，责怪 Public opinion blames Mrs Smith for leading the girl astray.
blast 一阵(风)，一股(气流) a blast of wind
blaze 火焰 The fire sprang into a blaze.
blunt 钝的 The sunwas blazing down and the heat was oppressive.
blush (因害羞、激动、窘困)脸红 blush with(或 for) joy
boast 自吹自擂，自夸的话 He is full of boasts.
bolt 螺栓，(门，窗的)插销 a small bag of nuts and bolts
boom 低沉有回响的声音 The great bell tolled with a deep boom.
border 边界，边境，边沿 a district on the Kampuchean side of the border with Thailand
bore 钻孔，挖(通道) bore through a wall
bounce 弹起，反弹 The ball doesn’t bounce well.
bound 跳跃，弹回 She bounded to her feet andwaved her right hand triumphantly.
boycott (联合起来)抑制，拒绝参加 boycott uncooperative manufactures
brace 托架，支架 He braced his muscles and lifted the weight.
breed (使)繁殖 Rabbits breed families rapidly.
bribe 贿赂 accept(或 take)a bribe from sb.
brief 短暂的，简短的，简洁的 a brief holiday
brisk 轻快的，生气勃勃的 a brisk pace
brittle 易碎的，一碰就破的 brittle glass
brush 刷子，毛刷 a laundry brush
bump 碰，撞(against, into) The truck bumped against the wall in the dark.
burst 爆炸，爆裂 The boiler burst.
背单词时考研英语复习最重要的工作，但大家不能死记硬背，效率不高，浪费时间，一定要注意对单词各种词义的理解和把握。