They don't know how long the meeting will _________.[ ]
A. start
B. have
C. last
D. keep
答案:C
男,27岁。右足癣处红肿热痛5.天后出现右小腿5条纵行红线,有压痛。考虑诊断为
A.急性淋巴管炎B.丹毒C.急性蜂窝织炎D.急性淋巴结炎E.气性坏疽
人防工程主要有哪些具体作用?