—Are you scared of the flight?    —No, just a little _______. [ ]

A. angry

B. serious

C. anxious

D. calm

慢性肺气肿常见的X线征象是()

A．血管影细长、稀疏

B．两横膈上升

C．由于肺通气及循环障碍易引起肺源性心脏病

D．两肺野透过度增高

E．胸部膨隆，肋间隙增宽