国家秘密文件、资料可以通过普通邮政“特快专递”传送。
参考答案:错
--- Could you turn the TVdown a little bit?
--- ________. Is it disturbing you?
A.Yes, no problem.
B.I’m sorry.
C.Not a bit
D.It depends
产生液气胸的常见原因是胸腔积液并发()
A.感染
B.外伤
C.出血
D.胸膜粘连
E.肺转移瘤