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【多选题】
关于计算机病毒,下面哪一个说法是正确的().A.
一台计算机能用A盘启动,但不能用B盘启动,则计算机一定感染了病毒
B.
有些计算机病毒并不破坏数据,而是占用磁盘存储空间
C.
计算机病毒不会损坏硬件
D.
可执行文件的长度变长,则该文件有可能被病毒感染
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举一反三
【单选题】He ______ unwisely, but he was at least trying to do something helpful.
A.
may have acted
B.
must have acted
C.
should act
D.
would act
【简答题】个人独资企业的名称中不得使用____、____、或者____字样。 A有限 B有限责任 C有限公司 D公司
【单选题】I'm sure he must have been sleeping at the moment, __________.
A.
aren't I
B.
mustn't he
C.
wasn't he
D.
hasn't he
【简答题】Had he not taken your advice，________. [A] he would make a bad mistake [B] would he have made a bad mistake [C] he would have made a bad mistake [D] he had made a bad mistake
【单选题】I’m surprised that he ______ in the match.
A.
should fail
B.
should have failed
C.
would have failed
D.
may have failed
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