矢状位胸腺垂直径最大约为（）
A、1mm~2cm
B、3mm~4cm
C、5mm~7cm
D、8mm~9cm
E、以上均不是
参考答案：C
The ________ cause of his illness was excessive drinking, but the real cause was his deep grief at his
wife's death.[ ]
A. apparent
B. obvious
C. clear
D. distinct
神经衰弱的定义：
