Question

这句话该用which还是用those?

All of the maintenance operations are VCP commands which are defined by VCP protocol?
是否必须加逗号,然后用Which?
which 是指VCP Commands

回pioot,我最近送分.

Answer 1

这个概念一定要搞清楚：
这是非限制定语从句，须加逗号，然后再加which
All of the maintenance operations are VCP commands, which are defined by VCP protocol

这个我再具体帮你解释一下：

这里的VCP commands不需要定义是哪种VCP commands,不是说很多里我要形容出来是哪个VCP commands.

定语从句有限制性和非限制性两种。限制性定语从句是先行词不可缺少的部分，去掉它主句意思往往不明确；非限制性定语从句是先行词的附加说明，去掉了也不会影响主句的意思，它与主句之间通常用逗号分开，
例如：
This is the house which we bought last month. 这是我们上个月买的那幢房子。（限制性）
The house, which we bought last month, is very nice.这幢房子很漂亮，是我们上个月买的。（非限制性）

2) 当先行词是专有名词或物主代词和指示代词所修饰时，其后的定语从句通常是非限制性的，例如：
Charles Smith, who was my former teacher, retired last year. 查理·史密斯去年退休了，他曾经是我的老师。
My house, which I bought last year, has got a lovely garden. 我去年买的的那幢房子带着个漂亮的花园。
This novel, which I have read three times, is very touching. 这本小说很动人，我已经读了三遍。

3) 非限制性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数，例如：
He seems not to have grasped what I meant, which greatly upsets me. 他似乎没抓住我的意思，这使我心烦。
Liquid water changes to vapor, which is called evaporation. 液态水变为蒸汽，这就叫做蒸发。

Answer 2

可以加逗号可以不加逗号
非限制性定语从句当中,which前面必须加逗号
但是你可以把这句句子看成非限制性定语从句，就不用加逗号了，这样关系代词用which that都可以！

Answer 3

应该加逗号再用which,是非限制性定语从句,即:
All of the maintenance operations are VCP commands, which are defined by VCP protocol.
如果你想用those的话你可以用一个连词and,即:
All of the maintenance operations are VCP commands and those are defined by VCP protocol.

Answer 4

用which
加了为非限定定语从句！句首是用all开头的不定代词，所以不that

Answer 5

All of the maintenance operations are VCP commands which are defined by VCP protocol.
which 指 VCP commands；

All of the maintenance operations are VCP commands, which is defined by VCP protocol.
which指all of the maintenance operations are VCP commands这件事。

Those不能取代which在从句中的作用。非要用的话，只能做主语。
All of the maintenance operations are VCP commands. Those are defined by VCP protocol.
Those指VCP commands.

不懂这句话的含义。仅从语法上做出以上分析。