2.科普知识
What a fine day!
The sun _1_ and everything _2_ bright. Can you felt _3_ when you stand in the
sun? The sun gives heat from far away. It is about one hundred and fifty
million kilometers _4_. The sun looks small because it is far from us, but _5_
it’s very huge.
The earth moves
around the sun. It _6_ one year from the earth to go around the sun. And at the
same time the earth _7_ is spinning(自转) around once every twenty-four hours.
The sun gives us
light. It keeps us _8_ . It makes thing _9_. Plants, animals and people need
the sun. We can’t live _10_ the sun.