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3)—Which is the deepest salt lake in the world?
—The Caspian Sea is the deepest of all the salt lakes.
4)—Did you know that China is one of the oldest countries in the world?
— Yes, I did. It's much older than the US.
语法：形容词比较级和最高级。
三、教学难点：
Large?numbers?
Comparative?and?superlative?form?of?adj.?and?adv.?
\Section A(1a-2c)
Ⅰ．Teaching?Aims?and?Demands
?1．Knowledge?Objects?
?Key?Vocabulary?
square??n.平方 meter??n.米 population??n.??人口
Asia??n.?亚洲 wall??n.??墙?
（2）Target?Language??
—What's?the?highest?mountain?in?the?world?? —Qomolangma.?
—How?high?is?Qomolangma??
—It's?8,844.43?meters?high.It's?higher?than?any?other?mountain.?
—Which?is?the deepest?salt?lake?in?the?world??
—The?Caspian?Sea?is?the?deepest?of?all?the?salt?lake.
?(3)Structure:?Large?numbers?
Comparative?and?superlative?form?of?adj.?and?adv.?
2.Ability?Objects??
（1) Learn?to?use?the?numeral?to?talk?about?the?facts?of?the?world.?
（2) Learn?and?master?the?usage?of?the?comparative?and?superlative?form?of?adj.?and?
adv.
?3．?Moral?objects?
Teach?Ss?to?love?our?nature?and?protect?our?environment
Ⅱ.Teaching?Key?Point?
Learn?and?master?large?numbers?