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为什么——天地篇
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文档概述
This is a color album consisting of sixty-two basic questions about the universe, such as how big the sun is; why the moon always follows you wherever you go; why the clouds do not fall, and why there...
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Questions about the Universe
What Is the Colour of Sunlight?
Why Does the Sunny Sky Look Blue?
Is the Sun a Big Fire Ball?
Can the Sun Bum Out?
How Can the San Be Covered by Clouds Since It Is Much Bigger Than the Earth?
Why Can't We See the Sun at Night?
8 Which Is Bigger, the Sun or the Moon?
Which Is Bigger, a Star or the Moon?
What Is on the Moon?
Why Is the Moon Sometimes Round and Sometimes Not?
Why Do the Stars Shine in the Sky?
Why Do the Stars Twinkle in the Sky?
Why Can't We See the Stars During the Day?
Why Is a Starry Night Always Followed by a Sunny Day?
Are All the Stars White?
Are There More Stars in Summer Than in Winter?
What Is the Milky Way?
Are All the Stars the Same Size?
How Far Are the Stars from Us?
Are There People Living on Other Planets?
Where Do the Sun and the Moon Go When It Rains?
Why Is the Sun Bigger at Sunrise and Sunset Than It Is at Noontime?
What Is It Like at the Bottom of the Sea?
Why Do Floods Occur in Some Places?
Why Is Spring Water Hot?
Why Is There a White Circle Around the Moon?
Where Does the Dew Come from?
Why Is It Difficult to See Inside a House from the Outside During the Day?
Why Do We Seem to See Red Light When We Close Our Eyes Under the Sun?
Water Is Transparent so Why Is Its Spray White?
How High Is the Sky? Can We Touch the Sky When We Ride in the Airplane?
What Is the Earth?
Why Can't We Feel the Movement of the Earth?
What Is It Like Inside the Earth?
Why Is It Very Hot in Summer?
Why Is There Day and Night?
Why Are There Volcanic Eruptions on the Earth?
Where Do Mountains Come from?
Where Does the Desert Come from?
Why Is It Colder in the Mountains Since They Are Closer to the Sun?
Will Mountains Grow?
46 Why Can the Clouds Move?
Why Don't the Clouds Fall?
Why Do We Feel the Sky Is Low on a Cloudy Day?
Why Does It Rain?
Why Is There Generally a Rainbow After a Shower?
Why Is the Air Especially Fresh After a Thunderstorm?
Why Are There Hailstones in Summer?
What Is Air Like?
Will All the Water on the Earth Be Used Up?
How Does the Wind Start to Blow?
What Is the Use of Air?
Why Do Cobblestones Have a Smooth Surface?
Do You Know How to Tell Directions?
Why Can Spring Water Make Noise?
How Are Echoes Made?
Why Do Things Around Us Have Different Colours?
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