题目内容
(请给出正确答案)
[单选题]
Spark中DataFrame的()方法是进行查询前n行记录。
A.where
B.join
C.limit
D.apply
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A.where
B.join
C.limit
D.apply
"Spark" in the sixth Paragraph means______.
A.cause
B.flame
C.burn
D.reason
applause collision coarse surround betray
rouse spark incident execute postpone
clumsy extraordinary relief immense doubtful
边属性经过变换生成新的图。()
此题为判断题(对,错)。
The lightning-like spark is created by ______.
A.the movement of the dome
B.the repelling between the collected electrons
C.the escaping of the electrons from the dome
D.the collection of many electrons on the dome