一、20个英文单词
1，mean
v.表示，意思是，意味着，打算；n.平均值，中庸；adj.平均的，中等的，吝啬的，低劣的，刻薄的
The green light means we can cross the road.
2，digital
adj.数字显示的，数码的，电子的，数字的；n.数字仪表，时钟，键
This is a black digital stopwatch.
3，education
n.教育，培养，教育学
Nowadays students receive most of their education in the classroom.
4，talent
n.天赋，才能，天才，人才
This baby showed great talent as he was playing the pinao.
5，especially
adv.尤其，特别，格外，异常地，专门
Everybody was pretty angry,but the guy in the middle was especially angry!
6，folk
adj.民间的，普通百姓的，民俗的；n.大众，亲人，家人，民间音乐，民众，人们
Many Chinese folk arts are still popular today.
7，risk
vt.冒...的危险；n.风险，危险，冒险
The fireman risked his life and rushed into the fire.
8，notice
n.告示，通知，注意；v.注意，察觉，预告
The girl puts the notice on the bulletin board.
9，ahead
adv.领先的，向前，提前，在前面；adj.在前的，向前的，提前的
I am running ahead of the rest of the group.
10，level
n.水平，标准，等级，水平面，数量，程度，浓度；v.瞄准，拉平，变得平坦，对准目标;adj.平坦的，水平的，登高的
Players are separated into three levels in this game.
11，wallet
n.皮夹，钱包
My wallet holds all of my money and credit cards.
12，method
n.方法，条理
This is the correct method for washing your hands.
13，absent
adj.缺席的，不在场的，心不在焉的，出神的，不存在的；v.不在，缺席，不参加
What a surprise! The best student is absent from school!
14，wing
n.翅膀，机翼，门厅，分部；v.飞行，空运
Mommy,I want the doll with the butterfly wings.
15，earthquake
n.地震，大震荡
The rescue team went to rescue the victims of the earthquake.
16，keyboard
n.键盘，琴键；v.录入信息
I can't focus on my work with such a lovely keyboard.
17，meaning
n.意思，含义，意义，价值；adj.意味深长的
This word has so many different meanings.
18，market
n.市场，行情，销路；v.销售，出售，推销，促销
I usually buy fruits and vegetables at the market.
19，purpose
n.目的，意图，用途，效果，决心；v.企图，打算
His purpose of exercising is to get more muscles.
20，million
num.百万，许多
The businessman holds one million dollars in his arms.
二、空间几何体命题模型精讲
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