语法与词汇
Although the chemical elements niobium and tantalum are not quite ----------zirconium and hafnium, the differences between them are slight
A、
as similar
B、
as similar as
C、
similar than
D、
that similar
【正确答案】
B
【答案解析】
分析：as similar as结构， C必须是比较 结构。 翻译：尽管化学元素铌和钽与锆和铪不是非常相似，但是它们的差别很小。
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