交流电路中电流比电压滞后90°，该电路属于（）电路。
A、纯电阻
B、纯电感
C、纯电容
参考答案：B
__________in the newspaper last week, the news of his wedding spread quickly in the city.
A．Having been announced
B．To announce
C．Being announced
D．To be announced
女性，61岁。右上腹痛，消瘦。查体：肝肋下5cm，质硬，有压痛，表面有结节感，边缘不整，可闻及血管杂音。该患者可能诊断为（）.
A.肝炎
B.肝血管瘤
C.肝淤血
D.肝癌
E.肝棘球蚴病
