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新课标必修3


UNIT 4

A visit to the moon

? Do you want to go to the moon? ? Imagine what you will feel when you are in space?

? The pull of the earth’s gravity will disap

pear when you are in space. ? You will be weightless. ?The gravity of the moon is very light. ?You will weigh less than on the earth.

The gravity on the moon is 1/6 as strong as it is on earth. This means that someone who weighs 150 lbs(磅) on Earth would weigh only 25 lbs on the moon! You might think that this would make walking much easier, but it is actually quite difficult Later in the Apollo(阿波罗) (Moon landing) mission, astronauts discovered that it was easier to hop(跳) than it was to walk .

Space walk

Yuri Gagarin
Russia 1961

the first man in space

Neil Armstrong?
U.S.A. 1969

The first man on the moon

Do you know who they are?

China is planning to land on the moon in the near future.

Reading
A visit to the moon

Fast reading: True or False
1. The force of of gravity would change four times on their journey . ( F ) 2. When they were on the moon, they would not feel the gravity because there was no gravity on the moon. ( F )

3. Since the gravity has changed, their walk didn’t need a lot of practice. ( F )

Detailed reading:
Read Para 2 carefully and underline 3 sentences that show the changes of the gravity.

as he left

in space on the moon)

the way gravity changed left the earth in space on the moon The gravity became very strong.

The gravity disappeared.
It became very light.

Q&A
Was their returning painful? What happened to the spaceship? Yes. Fire broke out on the outside of the spaceship.

Summary
Last month I visited the moon with my friend. gravity Before we left, I was told the force of ______ would change three times on our journey. Then we took lessened off. Gradually the weight _______. When I was in space, it __________. We _______ weightlessly in disappeared floated the cabin and I cheered up When I was on the _____ ____. moon, I was surprised to find out even walking needs lots of practice now that gravity changed. ____ _____ The returning of the earth was very __________. frightening We were amazed to watch fire ____ ____ on the break out outside of the ship.

Homework

Write a passage explaining three problems you might meet on the moon and how you will solve it.

2. watch …do/doing :观看,注视
我们看着太阳正在树后面落下。

We _____________________ watched the sun setting behind the trees.
每一天当他们看到植物生长,他们的 心里都充满了希望。

Every day as they ______________________ , their watched the plant grow hearts filled with hope.

3. …twice as far as …
1). “A + be + 倍数 + as +形容词原级 + as + B”. This tree is three times as tall as that one. His father is twice as old as he. 2). “A + be + 倍数 +形容词比较级 + than +B ”

The Yangtze River is almost twice longer than the Pearl River.
长江差不多比珠江长两倍。

The number of students in our school is three times larger than that in theirs.
我们学校学生数量是他们学校的三倍。

3). “A + be + 倍数 + the +名词
(size, length, amount) + of + B”

The newly broadened square
is four times the size of the previous one.
新扩建的广场是未扩建时的四倍大。

— Do you regret _______(pay) 100 dollars for the painting? — No, I would gladly have paid __________ (两倍那么多了)for it.

( paying; twice as much)

Translation:
1. 既然你忙, 就让我给你做吧。

Now that you are busy, let me do it for you.
2. 既然人都齐了, 咱们开始干吧。

Now that everyone is here let’s start work.

4. now that 既然; 现在/当时
now that同since相似,语气较弱, 强调人们已知的事实。 Translation: 1. 既然你忙, 就让我给你做吧。 Now that you are busy, let me do it for you.

2. 既然人都齐了, 咱们开始干吧。
Now that everyone is here let’s start work.

4. But when I tried to step forward, I found I was carried twice as far as on the earth and fell over.
1). A + be + 倍数 + as +形容词原级 + as + B This tree is three times as tall as that one.
这棵树是那棵树的三倍高(比…高两倍)。

His father is twice as old as he.
他父亲是他年龄的两倍(大一倍)。

2). A + be + 倍数 +形容词比较级 + than + B

The Yangtze River is almost twice longer than the Pearl River.
长江几乎比珠江长两倍。

The number of the students in our school is three times larger than that in theirs.
我们学校的学生数量比他们学校的多三倍。

3). A + be + 倍数 + the +名词 (size,

length, amount) + of + B
The newly broadened square is four times the size of the previous one.
新扩建的广场是未扩建时的四倍大。

— Do you regret _______ (pay) 100 dollars for the painting? — No, I would gladly have paid __________ (两倍那么多了) for it.

( paying; twice as much)


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