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不定项选择
薯类既可作为主食,又可作为蔬菜。
A.错误
B.正确
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学校课外活动小组课可以聘请有特长的在校专业人员担任指导老师。 ( )
单项选择题
(Single choice question)Which kind of clustering method builds a clustering tree from data? ()
A、Partition clustering
B、Hierarchical clustering
C、Grid-based clustering
D、Density-based clustering
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Before the time of the newspaper, _______ . A.
bad news traveled quickly and good news slowly B.
few people cared about events that took place in far away countries C.
kings and rulers were often overthrown or killed D.
news was passed from one person to another
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