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【多选题】
下列关于计算机病毒特性描述正确的是()A.
任何计算机病毒只要侵入系统，产生不同程度的影响
B.
计算机病毒通常附着在程序或磁盘较隐蔽的地方
C.
大部分病毒感染系统后一般不会马上发作，可长期隐藏在系统中
D.
计算机病毒可通过各种渠道从已被感染的计算机扩散到未被感染的计算机
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举一反三
【简答题】活期存款结息日为每年（ ） 。
【单选题】What kind of students may NOT like online distance learning?
A.
Those busy with their schedules.
B.
Those in need of further education
C.
Those unable to attend regular classes.
D.
Those in favor of face-to-face teaching.
【单选题】All the students were eager to know what the future may have________for them when they graduated from the school. [ ]
A.
in store
B.
in common
C.
in all
D.
in particular
【单选题】What happens to students who miss more than four classes?
A.
They may fail the course.
B.
They may not have to make up the work.
C.
They may have to do additional assignments.
D.
They may not understand the labs.
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