【判断题】对于有限长、断面是圆形的载流直导线的磁场问题,由于圆形断面具有对称性,所以可用安培环路定理来求解此导线在周围产生的磁场 。
【单选题】Sharon: “Really? What happened to them?” a. bored b. shocked c. curious
【判断题】利用安培环路定理可以计算有对称性的磁场强度H,然后根据介质的磁化规律,即磁场强度H和磁感应强度B之间的关系,可以求得B。
【简答题】在稳恒电流的磁场中,任意选取的闭合积分回路,安培环路定理 都能成立,因此利用安培环路定理可以求出任何电流回路在空间任一处产生的磁场强度.以上看法如有错请指出并改正.
【单选题】---We can use QQ to talk with each other on the Internet. ---Really? Will you please show me it?
【简答题】Cloze test. Every child has his own dream. Every child hopes to be an . 1 , is it really like what they imagine? As a boy 2 lives in modern times and in a modern city, I feel 3 pressure (压力) on m...
【单选题】听力原文:M: How did your talk with Henry go? W: It'd never really got off the ground. Q: What does the woman mean? (17)
A.
They didn't have a talk.
B.
They talked about the facts.
D.
They couldn't lake a walk.
【单选题】关于耐甲氧西林葡萄球菌,叙述不正确的是 ( )
C.
在琼脂筛选试验中只要有1个菌落生长,就判为耐药
D.
体外药敏试验表现为敏感的药物,临床疗效也一定好
E.
在药敏培养基中加入2%~4%氯化钠可提高耐药菌的检出率
【单选题】听力原文:Does the green tag mean the item is on sale? (A) You know, I'm not really sure what he meant. (B) Yes, those are 10 percent off. (C) No, that's the only color we have in stock. (6)