问题
单项选择题
下列叙述中哪一条是正确的
A.反病毒软件通常滞后于计算机病毒的出现
B.反病毒软件总是超前于计算机病毒的出现,它可以查、杀任何种类的病毒
C.已感染过计算机病毒的计算机具有对该病毒的免疫性
D.计算机病毒会危害计算机以后的健康
答案
参考答案:A
解析:用杀毒软件杀毒就是用软件来制约软件,既然足软件就 不可能做到100%的完美,不可能发现、清除所有的病毒。
下列叙述中哪一条是正确的
A.反病毒软件通常滞后于计算机病毒的出现
B.反病毒软件总是超前于计算机病毒的出现,它可以查、杀任何种类的病毒
C.已感染过计算机病毒的计算机具有对该病毒的免疫性
D.计算机病毒会危害计算机以后的健康
参考答案:A
解析:用杀毒软件杀毒就是用软件来制约软件,既然足软件就 不可能做到100%的完美,不可能发现、清除所有的病毒。
Tom was a middle-aged leather trader (皮货商) whose repeated failure in career made him a depressed man, often __21_ that he had been cheated by others. One day he told his wife he was so __22__ with the city that he had to leave. So his family moved to another city. It was the evening of a weekend. When Tom and his wife were busily _23_ up their new home, the light suddenly __24_. Tom was regretful to have forgotten to bring along 25__ and had to wait _26_ in a low mood. Just then he heard light, hesitant 27_ on his door that were clearly audible (听到) in the __28__ night. “Who’s it?” he wondered, since Tom was a _29__ to this city. And this was the moment he especially hated to be __30__, so he went to the door and opened it __31_. At the door was a little girl, shyly asking, “Sir, do you have candles? I’m your neighbor. ” “No,” answered Tom in anger and shut the door __32__. “What a nuisance (麻烦事)!” He complained over it with his wife. “No sooner had we settled down than the neighbor came to _33__ things.” After a while, the door was knocked again. He opened it and found the same girl outside. __34_ this time she was _35__ two candles, saying, “My grandma told me the new neighbor downstairs might need candles. She _36_ me here to give you these.” Tom was very _37__ by what he saw. At that moment he suddenly realized what caused his _38__ in life. It was his _39_ and harshness (刻薄) with other people. The person who had cheated him in life was _40__ nobody else but himself, for his eyes had been blurred (蒙蔽) by his unsympathetic (无同情心的)mind.
|