计算机病毒是人为地编制出来、可在计算机上运行的程序。 ( )
参考答案:对
___Hi, Tom._____?
___ well .Long time no see! I miss you very much.
A. What are you doing
B. What is going on
C.How do you like it
D. How is it going
支原体肺炎特点是()
A.长期咳嗽,咳大量脓痰,反复出现大咯血
B.45岁以上伴大量长期吸烟史,持续痰中带血
C.咳嗽剧烈时,痰中带血
D.低热、盗汗、咳鲜血痰
E.夜间阵发性呼吸困难伴咳粉红泡沫样痰