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【多选题】
下列选项中,关于侵入岩说法正确的是( )。A.
花岗岩岩基多为不规则的块状影像，块状体有时在一个或两个有一定的延伸。
B.
一般情况下，脉岩呈现垄状线形影像，它的一侧明亮，另一侧为深暗的阴影，其明亮部位的色调为岩脉的真实色调。
C.
在基岩裸露区，侵入岩和围岩两种岩性可以根据色调、图形和地形水系类型的不同，很容易将其区分开来。
D.
如果接触带为有一定宽度的接触变质带，那么，它从色调、图形类型和清晰程度、地形等，都是侵入岩和围岩之间的过渡类型。
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举一反三
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