部颁反措要点对直流熔断器与相关回路配置的基本要求是:();增强保护功能的冗余度。
参考答案:消除寄生回路
情境反应,选择正确答案。
1. 如果你想知道去电影院怎么走,你会问:[ ]
A. Are you going to the cinema?
B. Excuse me, what time is it?
C. Excuse me, how can I get to the cinema?
2. 如果你想知道你朋友的爸爸是做什么的,你会问:[ ]
A. What does your father do?
B. Who is your father?
C. How is your father?
3. 如果你想询问妈妈上午想去哪里,你会问:[ ]
A. Where are you going in the morning?
B. What would you like for lunch?
C. What are you going to do in the morning?
青霉素钠需做成粉针剂注射使用是由于
A.氢化噻唑环易破坏B.侧链酰胺易断裂C.羧基易脱去D.酰胺环上的取代基易氧化E.β—内酰胺环易水解和分子重排