【单选题】以下描述正确的是
A.
回归分析主要是了解自变量与因变量之前的数量关系,主要用于寻找两个或两个以上的变量之间相互变化的关系;
B.
聚类分析用于发现大量数据中变量间的关联性。随着不停地收集和存储大量数据,从大量商业交易的记录中发现有趣的关联关系
C.
聚类分析通过一批已知的训练数据建立一棵决策树,然后利用建好的决策树,对数据进行预测。决策树的建立过程可以看成是数据规则的生成过程。
【判断题】安全模型是对安全策略所表达的安全需求的简单、抽象和无歧义的描述,其只涉及安全性质,不涉及系统功能或实现。
【简答题】Our dog Zip is always bringing things home for us to keep! Many of them were toy bears, lambs and ducks. We never could 1 the owners. One day Dad was reading the paper. "Listen to this, everybody,” h...
【简答题】Once there was a king who told some of his people to dig a pond ( 池子 ).The king then told his people that one person ______ 1 each family had to bring a glass of milk during the night and put it into ...
【单选题】( )是对( )所表达的( )的简单、抽象和无歧义的描述
【判断题】在平面上,一条动直线AB沿着一个固定的圆做滚动时,此动直线上一点K的轨迹CK,称为该圆的渐开线。
【简答题】Choose the best answer and complete the passage ( 选择最恰当的选项完成短文 ) An old farmer lived with his grandson. Each morning, the 1 got up early and read his Bhagavad Gita. One day the grandson asked, “Grandp...
【简答题】Choose from the bank ONE word to fill in each of the following blanks in the passage. Each word in the bank should be used only once. flea markets, charge, refunds, items, duties, restrictions, compar...