一、20个英文单词
1，body
n.身体，主体，尸体，人，正文，团体，社团，机构，大量，大批；v.赋予形体，体现
A large body of doctors attended the meeting.
2，pleasant
adj.令人愉快的，舒适的，友好的，和蔼的，有礼貌的
Her pleasant smile has lit up my day.
3，guy
n.男人，家伙
Look at this guy! He is handsome！
4，ill
n.问题，苦恼，弊病，邪恶，不幸，祸害，坏话；adj.坏的，不好的，生病的，不适的；adv.不充分的，坏，恶劣的
Addiction to mobile phones may become an ill of the modern society.
5，wage
n.工资，薪水；vt.开展，进行
She was so happy when she got her wages.
6，mutual
adj.互相的，彼此的，共同的
Good communication can build a bridge of mutual understanding.
7，widespread
adj.分布广的，普遍的，广泛的
Sheep are widespread in the prairie region.
8，biography
n.传记文学，传记
On the shelf,you can find many biographies of famous people.
9，revise
v.修改，修订，温习（功课）
She is revising her paper according to the advice given by her teacher.
10，withstand
vt.忍受，抵挡
We all have to withstand our own pressures in life.
11，failure
n.失败者，失败，破产，未作，未履行
If I can't increase sales, I'll be a failure!
12，dairy
adj.奶制的，牛奶的，乳品的；n.乳制品，牛奶厂，乳品店
Dairy foods contain lots of calcium.
13，extend
v.提供，伸展，展开，延申，延长，涉及，扩展，使...竭尽全力，提供
The team extends a warm welcome to the new member.
14，explosion
n.爆炸，爆发，激增
The firework explosions were amazing.
15，dictation
n.口述，听写
The teacher is taking dication.
16，leisure
n.闲暇，休闲；adj.空闲的
The busy man enjoys his leisure time only on weekends.
17，cohisive
adj.团结的，紧密结合的，有黏着力的
We must work as a cohesive group and support each other.
18，disturbance
n.扰乱，打扰，骚乱，混乱，心神不安，烦恼
Speaking so loudly was such a disturbance while I was trying to work.
19，inherent
adj.生来就有的，内在的，固有的
The baby girl has an inherent love of beauty.
20，chop
v.(用力)切，砍，降低，向下猛击，终止；n.砍，劈，剁，排骨，嘴周围的地方
He's chopping firewood.
二、分式与根式方程、不等式
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