多项选择题

铁壳开关操作机构的特点有（）。

A、采用储能合、分闸操作机构
B、无机械连锁
C、当铁盖打开时不能进行合闸操作
D、当合闸后不能打开铁盖

你可能感兴趣的试题

多项选择题

我国《公司法》规定，股份有限公司的设立可以采取以下哪两种方式
A、发起设立
B、募集设立
C、合并设立
D、吸收设立

单项选择题

The following is an abstract, consisting of 5 sentences. Which key element does Sentence ② describe?
Abstract: ①Anxiety about tests and test-like situations was examined in a series of studies of elementary school children in 4 Connecticut towns. ②High anxiety (HA) and low anxiety (LA) groups were identified by General Anxiety and Test Anxiety scales for which format and validation details are presented. ③Data support hypotheses concerning fantasies of bodily injury and cues which interfere with the anxious child's performance. ④Ratings by fathers of a portion of the sample discriminated between HA and LA children; mothers' ratings did not. ⑤Implications for school testing programs are discussed

A．the methods
B．background information
C．the main conclusion
D．the key results or findings