此CT腹部增强扫描时相为（）
A.动脉期
B.门静脉期
C.延迟期
D.平衡期
E.90秒延迟
参考答案：A
Her son was accused of cheating by the police, ________ made it difficult for her to go to sleep.
A．what
B．as
C．which
D．where
个人实盘黄金买卖的投资者在需要时可以向银行申请办理黄金的实物交割。（）
