脂肪瘤的起源,下述正确的是()
A.纵隔胸膜下脂肪组织
B.胸壁皮下脂肪组织
C.胸腺脂肪组织
D.结外淋巴组织
E.淋巴未退化的胸腺组织
参考答案:A, B, C
His father got him a job in a bank but soon it became clear he was not fit for that kind of work. [ ]
A. why
B. what
C. whether
D. that
A.当线框磁通量为零时,感应电动势也为零
B.当线框磁通量减小时,感应电动势在增大
C.线框转动的角速度ω等于Em/φm
D.当线框磁通量等于0.5φm时,感应电动势等于0.5Em