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【单选题】
下列关于缺失值检测的说法中,正确的是()。A.
null()和notnull()可以对缺失值进行处理
B.
dropna()方法既可以删除观测记录，也可以删除特征
C.
fillna()方法中用来替换缺失值的值只能是DataFrame对象
D.
Pandas库中的interpolate模块包含了多种插值方法
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举一反三
【简答题】A．He has a headache. B．He failed his history exam. C．He is sleepy. D．He is too busy.
【单选题】A) He has just too many things to attend to. B) He has been overworked recently. C) He has a difficult decision to make. D) He has just quarreled with his girlfriend.
A.
B.
C.
D.
D
【单选题】He has too ______ a nature to get angry, even if he has good cause.
A.
slight
B.
mild
C.
light
D.
loose
【单选题】What is the man's problem?
A.
He hasn't received an important report.
B.
He has too many expenses.
C.
He cannot contact the courier.
D.
He missed a deadline.
【简答题】A．He has a headache. B．He failed his history exam. C．He is tired. D．He is too busy.
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