In a normal fault, the hanging wall moves downward relative to the footwall.
查看答案
The age of the Earth is ______ billion years.
Which element is the most abundant one in the crust (by weigh)?
A. Si
B. O
C. Al
D. Fe
Silicate minerals are the most common type of minerals,
Metamorphism can also be divided into prograde and retrograde metamorphism
微信支付 
支付宝支付