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【简答题】
阅读理解。 This is Joy's room. It's a big room. There are some pictures on the wall. There's a desk and a chair in her room. The desk is near the window. Her bag and pencil case are on the desk. There are some pencils, a pen and a ruler in the pencil case. Joy's bed is near the desk. Her shoes and a ball are under the bed. Joy and her friend, Kate, are often in the room. They like the room very much. 1. Joy s room is ______. A. not small B. not big C. very old 2. There ______  in her room. A. is a desk and some chairs B. are some desks and chairs C. is a desk and a chair 3. Joy's pencil case is ______. A. on the desk B. near the window C. under the bed 4. Joy's bed is ______. A. near the desk B. on the desk C. under the desk 5. _____ shoes are under the bed. A. Kate's B. Joy's C. Betty and Kate's
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【单选题】调速时磁通φ和转速'的关系为( )。
A.
比例关系
B.
积分关系
C.
双曲线关系
D.
微分关系
【判断题】电容的伏安关系有微分形式和积分形式两种。
A.
正确
B.
错误
【简答题】R、C元件构成 积分电路和微分电路的条件是什么?电路形式是?请用数学知识推导其输出输入的微分或积分的近似关系
【简答题】和U的积分关系是____,微分关系是____。
【简答题】制度的缺陷 the d_________ in the system
【判断题】E(t)和F(t)之间存在微分和积分的关系。
A.
正确
B.
错误
【多选题】下列筹资中构成所有者权益资金的有________。 ( )
A.
发行债券
B.
发行股票
C.
盈余公积
D.
未分配利润
【判断题】频率分布和累积分布之间的关系是微分和积分的关系。
A.
正确
B.
错误
【单选题】关于麦克斯韦方程积分表示和微分表示关系的正确表述为
A.
两者完全一致,都是对宏观电磁场规律的总结
B.
两者完全一致,都是对微观粒子运动规律的总结
C.
都是对宏观电磁场规律的总结,但积分表示比微分表示适用范围更广
D.
都是对宏观电磁场规律的总结,但微分表示比积分表示适用范围更广
【简答题】在PID调节系统中,比例系数KP的确定比微分系数KI和积分系数KD更重要,因为它关系到()。
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