The way the Earth interacts with the sun s energy can be displayed in a diagram called the
【C1】
A.a little
B.how much
C.how many
D.a lot
【C1】
A.a little
B.how much
C.how many
D.a lot
A.inside the earth
B.inside earth
C.inside an earth
D.on earth
It can be learned from the passage that about four billion years ago ______.
A.the earth was in molten state
B.the earth surface temperature was above 100℃
C.the earth surface temperature was below 100℃
D.rain water could remain on the earth
A.the earth’s surface
B.the surface of earth
C.the earth surface
D.the surface of the earth
The purpose of Earth Day is ______.
A.to help people memorize the earth
B.to help people to learn how to protect the earth
C.to unite all the people on the earth
D.all of the above
The best title for this passage is ______.
A.The Origin of Life on Earth
B.Life Forms on Earth
C.The Discovery of Life on Earth
D.The Preservation of the Past Life on Earth
A.What else is
B.Is there anything
C.What's left
D.What on earth is
Aluminum is found on earth mostly in the form. of ______.
A.pure metal
B.bauxite
C.gold
D.liquid
A.It
B.As
C.That
D.What
According to the passage, the earth in its very early period was ______.
A.in molten state
B.in water state
C.in rock state
D.a vast ocean