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【单选题】
下面关于函数依赖的描述,错误的是_____。A.
若X→Y、X→Z,则X→YZ
B.
若XY→Z,则X→Z、Y→Z
C.
若X→Y、Y→Z,则X→Z
D.
若X→Y,则XZ→Y
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皮皮学刷刷变学霸
举一反三
【简答题】链入式是将所有的样式放在一个或多个以____为扩展名的外部样式表文件中
【简答题】A．To hear the music. B．To appreciate the music. C．To enjoy the music fully. D．To completely understand the music.
【单选题】It’s as if __________ were built into acquisition from the very beginning.
A.
excitement
B.
depression
C.
disappointment
D.
confusion
【单选题】Many disabling conditions like heart disease and stroke become commoner ____ we get older.
A.
with
B.
as
C.
for
D.
because
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