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【单选题】
若要定义同时影响两个或多个标签、类或 ID 的复合规则,可以使用复合选择器。在复合选择器中, CSS 定义由 3 部分构成:( )、属性( properties )和属性值( value )。A.
标签（ selector ）
B.
类别（ class ）
C.
ID （ id ）
D.
复合选择器名称（ name ）
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举一反三
【单选题】Successful online students think that online learning is _____.
A.
easier than learning in regular classrooms
B.
a fun way to study
C.
less convenient
D.
a convenient way to receive education
【单选题】One possible cause of uncertainty about online learning is that_____.
A.
only a half million people are enrolled in online degree programs today
B.
most people are used to a traditional, campus-based education
C.
an online education is not as effective as traditional instruction
D.
most programs offer rolling admissions
【简答题】《我所敬仰的蔡元培先生》作者是 ,曾任 代理校长。
【简答题】《雨霖铃》作者是()朝代的(),原名(),字(),自称()
【单选题】One possible cause of uncertainty about online learning is that______.
A.
only a half million people are enrolled in online degree programs today
B.
most people are used to traditional, campus-based education
C.
an online education is not as effective as traditional instruction
D.
most programs offer rolling admissions
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