题目内容

请简述当HDFS采用什么机制确保名称节点的安全。

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请论述HDFS中SecondaryNameNode的作用和工作原理。

Which system is a control system of ductless glands that secrete hormones within specific organs:

A. digestive
B. endocrine
C. nervous
D. urinary

The small gland in the brain that controls other glands is the:

A. adrenal
B. thymus
C. pituitary
D. corpus luteum

Which glands consists of two lateral masses:

A. pancreas
B. hypothalamus
C. pituitary
D. thyroid