问题
单项选择题
《继电保护和安全自动装置技术规程》规定，全绝缘变压器应增设零序过电压保护。零序过电压保护经（）时限动作断开变压器各侧断路器
A.0.1s~0.2s
B.0.2s~0.3s
C.0.3s~0.4s
D.0.3s~0.5s
答案
参考答案：D
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《继电保护和安全自动装置技术规程》规定，全绝缘变压器应增设零序过电压保护。零序过电压保护经（）时限动作断开变压器各侧断路器
A.0.1s~0.2s
B.0.2s~0.3s
C.0.3s~0.4s
D.0.3s~0.5s
参考答案：D
用方框中所给单词的适当形式填空，使句子通顺、正确。每个单词限用一次。（5分）
小题2:What does UN_________for? 小题3:You won’t be__________to watch with our fans if that’s what you think. 小题4:Mike often _________his weekends going swimming with his classmates. 小题5:The basketball match lasted three hours. It was quite_________. |