诊断致心律失常型右室心肌病时,以下哪项辅助检查最有意义()
A.心脏核磁共振显像
B.超声心动图
C.心内膜心肌活检
D.动态心电图
E.心导管及心血管造影
参考答案:A
北魏孝文帝改革
It's said to be a case of murder ________ the children were used by adults.
A.when
B.where
C.which
D.that