题目内容：
按信息资源所涉及的学科范围进行分类，美国WWW虚拟图书馆属于（ ）的学科信息门户。
A.综合性
B.单一学科
C.多学科
D.多语种
参考答案：
选择题：按信息资源所涉及的学科范围进行分类，美国WWW虚拟图书馆属于（ ）的学科信息门户。
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- 题目类型：选择题
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