Many students think geography is_________ math.( )
A. as difficult a subject as
B. as a difficult subject as
C. the same difficult subject as
D. a subject the same difficult as
答案是A.本题考查as…as的结构.same是形容词,不修饰形容词或副词,所以排除C和D.as…as结构中,两个as之间必须是形容词或副词的原级;B项是名词短语a difficult subject,所以排除;A项中两个as之间是形容词difficult,difficult同时又修饰了名词a subject,构成了"as+adj+n+as"的结构,故答案选择A.
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