职业中专英语第二册

2. all together 总计，共计
e.g Nearly 5000 to 8000 Chinese characters all together are in common use.
Step One: Revision
1. Revise the dialogue of last period by practice in pair. 2. Remind the Ss to pay attention to the usage of some phrases and expressions as follows: (1) to take sth with sb e.g to take our umbrella with us
Comprehension Exercises:
1 About _____ million cubic miles of water on earth is in the oceans.
A 200
B 230
C 330
2 ______ cause the water to move from the oceans to the land and
A good idea.∕ I' d love to.
Step 2 : Lead-in
世界上的水总量为138 598万立方千米，其中海水为133800万立 方千米，占总水量的96.53%，陆地水为4797万立方千米，占总 水量的3.47%，大气水为1.29万立方千米，占总水量的0.001。
水循环有三种形式：海陆间循环、内陆循环和海上内循环。海
(2) be good for 对…有好处 (3) Bad ∕Fine day, isn't it ? 谈论天气
Yes, it's raining hard. ∕ Yes, it's sunny and clear. (4) What's the temperature?
(5) Shall we go shopping？
陆间循环的过程是：海洋水经过蒸发变成水汽，水汽升到空中， 被气流送到大陆上空，一部分水汽在适当的条件下凝结，形成降 水。降落到地面的水，一部分沿地表流动，形成地表径流，一部 分渗入地下，形成地下径流，二者经河流汇集，最后回到海洋。 内陆循环的过程是：降落到陆地的水的全部或一部分经过陆面和 水面蒸发和植物蒸腾形成水汽，被气流带到空中，遇冷凝结成降 水，仍降落到大陆上。海上内循环的过程是：海洋面的水经过蒸 发，变成水汽，进入大气后遇冷凝结，形成降水，落回海洋面。 本课课文中所讲的主要是海陆间循环和内陆循环。
and fall from the clouds as rain and snow.
A the sunshine B the cool air C the warm wind
4The water that falls on land may move through the earth to become_____
from the land to the oceans.
A Winds
B Vapors
C The heat of the sun and the gravity of the earth
3 The water vapor in____ becomes drops of water that come together
Step 3: Listening and reading
1. What is the water cycle? 2. How do plants and animals return water to the air?
1 The water cycle is the movement of water from the oceans to the land and from the land to the oceans. It's a movement caused by the heat of the sun and the gravity of the earth.
A rivers and lakes B food for trees and plants C ground water
5 Plants and animals return____ water to the air.
A a lot of
B a little
C little
6 ____ the snow that falls in cold parts of the world become ice.
2 A plant has in its leaves small openings through which water vapor leaves the plant. A larger tree may lose 70 gallons of water each day. In this way, plants return water to the air. Human beings and animals do the same through their skin.
A All of
Hale Waihona Puke B Some ofC Little of
keys
1B
2C
3B
4C
5A
6B
Step 4: Difficult language points
1. be covered with 被 …覆盖
e.g In many areas of Northeast China, the ground is usually covered with thick snow for nearly the whole year.
Unit 6 the water cycle
• 教 师： * * * • 单 位：* * *职业教育中心 • 教 材： 职业中专英语第二册
CONTENT
Step 1: Revision Step 2 : Lead-in Step 3: Listening and reading Step 4: Difficult language points Step 5: Game Step 6: Summary Step 7: Homework