一、20个英文单词
1，compartment：n.分隔间，火车车厢的分隔间
Different compartments on the airplane have different prices.
2，rotate：v.以...轴转动，使旋转，轮流；adj.车轮状的
She rotates her body in the dance.
3，dwelling：n.住所
The dwelling of this small animal is a tree hole.
4，sparkle：vi.闪耀，焕发，活跃，才华横溢；n.光亮，活力，闪耀，闪光
The stars are beautiful as they sparkle in the sky.
5，shallow：adj.浅的，肤浅的，浅显易懂的；v.变浅，使变浅；n.浅滩，浅处
The boy is swimming in the shallow pool.
6，engineer：vt.设计，建造，当工程师，计划；n.工程师，技师，火车司机，技工
He's engineering a new model.
7，layout：n.布局，设计
The picture shows the layout of the flat.
8，dual：adj.双的，双重的
Her computer is equipped with dual screens.
9，violence：n.暴力，暴行，激烈，强暴，巨大的破坏力
The youngsters shouldn't settle the problem by using violence.
10，fluctuate：v.波动，起伏，涨落
The value fluctuates up and down.
11，liable：adj.易于...的，有可能...的，有义务的
People who frequently eat fried food are more liable to put on weight.
12，poster：n.海报，招贴
She is holding a poster.
13，thin：adj.数量少的，薄的，稀薄的；v.变薄，变少，变稀；adv.薄薄的
He has thin hair on top.
14，pants：n.裤子，内裤
Baggy pants are meant to be stylish, not offensive.
15，breathe：v.呼吸，低语
She breathes deeply to relax herself when doing yoga.
16，virgin：n.处女，童男，新手；adj.童贞的，处女的，原始的，未开发的
This tropical forest is a virgin land.
17，silence：n.寂静，沉默；v.使沉默
They sat face to face in silence.
18，masculine：adj.男子气概的，男性的
His beard and suit are masculine enough to show his charm.
19，invention：n.发明，发明物，虚构，发明才能，创意，创造
This robot is an invention of their team.
20，brake：vi.刹车；n.刹车，闸
Not again?! I hate having to brake my car for cows!
二、算术重难点
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