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【多选题】
According to the different content of silica, magma can be divided into ().
A.
A. acid magma
B.
B. neutral magma
C.
C. basic magma
D.
D. ultrabasic magma
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参考解析：
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A.
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B.
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C.
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【单选题】The so-called “three main kinds of rocks” refer to ().
A.
A.intrusive rocks, extrusive rock, sedimentary rocks
B.
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C.
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D.
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A.
A. extrusive rocks
B.
B. hypabyssal rocks
C.
C. plutonic rocks
D.
D. Magmatic Rock