[译林湖南版创新设计]2011高考英语一轮复习提能训练

Snow also is known to influence the movement of sound waves.When there is fresh snow on the ground，the surface of the snow takes in，or absorbs，sound waves.However，snow can become hard and flat as it becomes older or if there have been strong winds.Then the snow’s surface will help to send back sound waves.Under these conditions，sounds may seem clearer and travel farther.

Generally，the color of snow and ice appears white.This is because the light we see from the sun is white.Most natural materials take in some sunlight.This gives them their color.However，when light travels from air to snow，some light is sent back，or reflected.Snow crystals have many surfaces to reflect sunlight.Yet the snow does take in a little sunlight.It is this light that gives snow its white appearance.

1．What plays a major role in determining the shape of snow crystals？(no more than 8 words)

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2．What are the two designs snow crystals grow in？(no more than 4 words)

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3．Under what conditions can sounds travel a shorter distance，fresh snow or old snow？(no

more than 2 words)

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4．Generally，what is the color of snow？(no more than 2 words)

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Happiness can be described as a positive mood and a pleasant state of mind.According to recent surveys，sixty to seventy percent of Americans consider themselves to be moderately happy and one in twenty persons feels very happy.Psychologists have been studying the factors that contribute to happiness.It is not predictable，nor is a person in a clearly ideal situation necessarily happy.The ideal situation may have little to do with his actual feelings.

A good education and income are usually considered necessary for happiness.Though both may contribute，they are only chief factors if the person is seriously undereducated or actually suffering from lack of physical needs.

The rich are not likely to be happier than the middle-income group or even those with very low incomes.People with college educations are somewhat happier than those who did not graduate from high school，and it is believed that this is mainly because they have more opportunity to control their lives.Yet people with a high income and a college education may be less happy than those with the same income and no college education.

Poor health does not rule out happiness except for the seriously disabled or those in pain.Learning to deal with a health problem can contribute to happiness.Those with a good material life are happier in general，but those who have a loving，affectionate relationship are happier than those who rely on material alone.Love has a closer relationship with happiness than any other factor.

It should be noted that people quickly get used to what they have，and they are happiest when they feel they are increasing their level no matter where it stands at a given time.

Children whose parents were happily married have happier childhoods，but are not necessarily happier adults.

The best formula for happiness is to be able to develop the ability to bear failure，to have a