E.we consider things like age,race,looks,economic and social status,etc.
F.we pay attention to actual behavior,facial expression,and the way a person speaks.
G.there are no friendship ceremonies to strengthen the relationship between two people.
:7选5 (10分)Obtaining fresh water from icebergs
The idea of getting fresh water from icebergs that are moved to populated areas or places was once treated as a joke.Recently,scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food.___41__.
Glaciers are a possible source of fresh water that has been overlooked until recently..__ 42___.It contains fresh water so much that it could sustain all the rivers of the world for 1,000 years.
Huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year._ __43_.However,they are formed entirely on land,breaking off when glaciers spread over the sea.As they drift away from the polar region,icebergs sometimes move mysteriously in a direction opposite to the wind.Because they melt more slowly than smaller pieces of ice,icebergs have been known to drift as far north as 35 degrees south of the equator in the Atlantic Ocean.___.The difficulty exists such as its rapid melting in warmer climates.__45_.
A.Icebergs are not like sea ice,which is formed when the sea itself freezes.
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