以下方法中可以用于实现数据框中重复数据删除的函数是（ ） A: duplicated B: drop_duplicated C: fillna D: dropna

使用Pandas处理数据的时候，经常会遇到重复值。下列说法中错误的是 A: duplicated()返回值中用1表示重复，0表示不重复 B: duplicated()用于判断某行是否存在重复 C: duplicated()返回一个Series对象 D: duplicated()不能删除重复值

Pandas包中，统计数据框中重复数据的数目的方法是（ ）。 A: sum() B: duplicated() C: count() D: duplicated().sum()

Hisincompetenceinthemanagerialpostisaclearproofofhis______resume. A: formulated B: fabricated C: contemplated D: duplicated

The old lady lives alone; some of her nephews_______ to see her occasionally.?xml:namespace>;A. drop out B.drop by C. drop off D. drop on A: drop out B: drop by C: drop off D: drop on

I'll_________ some time tomorrow. A: drop from B: drop by C: drop upon D: drop on

删除存储函数的命令是（ ）。 A: drop database B: drop procedure C: drop table D: drop function

Remember not to ____________ without advance notice unless you are close to the host.( ) A: drop on B: drop off C: drop by D: drop out

删除视图的SQL命令是( )。 A: DROP TABLE B: DROP VIEW C: DROP QUERY D: DROP INDEX

‍16. Children in disrupted families are nearly twice as likely to of high school.‎‍‎ A: drop out B: drop off C: drop by D: drop on