什么是变电所（站）的操作电源？_爱下问搜题

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问题问答题简答题

什么是变电所（站）的操作电源？

答案

参考答案：变电所（站）开关控制、继电保护、自动装置和信号设备所使用的电源称为操作电源。

选择题

在pH=1的无色溶液中，下列各离子组因发生氧化还原反应而不能共存的是

A．NH₄⁺K⁺Na⁺CO₃^2- NO₃^-

B．K⁺ Na⁺ Fe²⁺ SO₄^2- NO₃^-

C．NH₄⁺ K⁺ Na⁺ HCO₃^-［Al（OH）₄］^-

D．NH₄⁺ K⁺ Na⁺ NO₃^- I^-

填空题

CONVERSATION 2 (Questions 5-8)

The age when Miss Rowling started to write: (5) .
Miss Rowling considers herself very luck because she can (6) herself by writing.
Miss Rowling never really imagines a (7) audience when writing.
Miss Rowling (8) know where the ideas for the Harry Potter books came from.

CONVERSATION 2 (Questions 5-8)

The age when Miss Rowling started to write: (5) .
Miss Rowling considers herself very luck because she can (6) herself by writing.
Miss Rowling never really imagines a (7) audience when writing.
Miss Rowling (8) know where the ideas for the Harry Potter books came from.