题目内容（请给出正确答案）

[单选题]

RDD有Transformation和Action算子,下列属于Action算子的是？（)

A.map

B.saveAsTextFile

C.Filter

D.reduceByKey

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更多“RDD有Transformation和Action算子,下列…”相关的问题

第1题

RDD操作分为转换（Transformation)和动作（Action)两种类型，下列属于动作（Action)类型的操作的是（)。

A.map

B.filter

C.group By

D.count

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第2题

植物遗传转化（plant genetic transformation)是指应用（)、（)或（)，有目的地将（)导入受体植物

植物遗传转化(plant genetic transformation)是指应用()、()或()，有目的地将()导入受体植物基因组中，并使其在后代植株中得以表达的过程。

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第3题

Donna Karan showed up in Jacmel to make plans for the transformation of the city.

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第4题

Writing exercises like copying， fill-in， completions and transformation are mainly the ty

pe of exercises used in_________

A.controlled writing

B.guided writing

C.free writing

D.expressive writing

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第5题

It can be concluded from the passage that the introduction of electronic media into the wo

rld of music ______ .

A．has brought about an information revolution

B．has speeded up the appearance of a new generation of computers

C．has given rise to new forms of music culture

D．has led to the transformation of traditional musical instruments

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第6题

transformation转化

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第7题

In__________ drills， the students change a given structure in a way so that they are expos

ed to other similar structures， which also helps them have a deeper understanding of how the structures are formed and how they are used.

A. substitution

B. transformation

C. comprehension

D. communicative

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第8题

英语六级考试选择题

There is much I enjoy about the changingseasons, but my favorite time is the _________ from fall to winter.

A) transmission B) transformation

C) transition D) transfer

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第9题

The word "mutation" in Line 6, Para. 3 means ______.

A.development

B.evolution

C.cultivation

D.transformation

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第10题

Iron（ρ＝7．86 g.cm-3)crystallizes in a BCC unit cell at room temperature．Calculate the radiu

Iron(ρ＝7．86 g.cm-3)crystallizes in a BCC unit cell at room temperature．Calculate the radius of an iron atom in this crystal．At temperatures above 910℃ iron prefers to be FCC．If we neglect the temperature dependence of the radius of the iron atom on the grounds that it is negligible，we can calculate the density of FCC iron．Use this to determine whether iron expands or contracts when it undergoes transformation from the BCC to the FCC structure．

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第11题

The mankind should face the phenomenon that the world has become a world of cities with __

____.

A．a lot of difficulties

B．efforts to improve housing condition

C．pressure of the basic needs

D．new models and a great deal of transformation of ideas and methods

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