谵妄综合征的主要特征为（）
A.意识障碍昼轻夜重
B.幻觉
C.注意涣散
D.记忆减退
E.错觉
参考答案：E
It was several minutes _______ we realized what was happening~our dog was trapped in a newly-dug tunnel.
A．since
B．before
C．until
D．while
国际货运代理的作用不包括()。
A.专业服务
B.促进流通
C.降低成本
D.咨询顾问
