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Most people believe that the landscape is
1
, but Earth is a
2
body with a continually
3
surface. There are 2 principal influences that shape the
4
: constructive process such as
5
and
6
forces such as erosion.
Most people believe that the landscape is
1
, but Earth is a
2
body with a continually
3
surface. There are 2 principal influences that shape the
4
: constructive process such as
5
and
6
forces such as erosion.
Hills and mountains are often regarded as the
7
of permanence. But, interestingly enough, the higher a mountain is, the more
8
it was formed. Lower mountains tend to be
9
and are often the eroded
10
of much higher mountain chains.
The earth"s crust is thought to be divided into huge,
11
segments, called plates, which
12
on a soft plastic layer of rocks. Some mountains are formed as a result of these crustal plates
13
into each other, and forcing up the rock at the plate
14
. Some mountains may be raised by
15
or formed as a result of
16
activity.
Any landscape represents only a
17
stage in the continuous
18
between different forces. The main agent of erosion is
19
. The landscape is continually eroded by rain, ice, tree roots and
20
.
答案：
movable/floating
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