神经衰弱的记亿力减退是由于
A．睡眠障碍
B．思维迟钝
C．情绪不稳
D．注意力难以集中
E．焦虑不安
参考答案：D
Not only my father but also my grandpa _______ flying to Singapore this weekend. [ ]
A. is
B. are
C. was
髂内动脉栓塞在几周后栓塞剂可被吸收：
A．3～4周B．2～3周C．2～4周D．3～5周E．3～6周
