第二类超导材料具有两个临界磁场,上临界磁场HC1和下临界磁场HC2,当外磁场H满足:HC1时()
A、R=0、B=0
B、R≠0、B=0
C、R=0、B≠0
D、R≠0、B≠0
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第二类超导材料具有两个临界磁场,上临界磁场HC1和下临界磁场HC2,当外磁场H满足:HC1时()
A、R=0、B=0
B、R≠0、B=0
C、R=0、B≠0
D、R≠0、B≠0