B

Dear Tom,

    Thanks for your letter. Do you want to know about my evening? Well, I usually get home from work at 6:00 p.m. I cook dinner for my family—my parents, my sister, and my brother. After dinner I usually watch TV, play computer games or play chess. I like playing chess because my father works in a chess club. I take a shower at around nine o'clock and then go to bed at around nine thirty. Sometimes I read some books because I can learn something about my work. How about your evening? Write to me soon, please.

Best wishes,

Victor

从随机编号为0001，0002，…5000的5000名参加这次鹰潭市模拟考试的学生中用系统抽样的方法抽取一个样本进行成绩分析，已知样本中编号最小的两个编号分别为0018，0068，则样本中最大的编号应该是（　　）

关于病毒叙述正确的是（　　）