皮皮学,免费搜题
登录
搜题
【简答题】
The computer virus is an outcome of the computer overgrowth in the 1980s. The cause of this term is the likeness between the biological virus and the evil program infected with computers. The origin of this term came an American science fiction 'The Adolescence of P-1' written 【S1】______ by Thomas J. Ryan published in 1977. Human viruses invade a living cell and turn them into a factory for manufacturing viruses. 【S2】______ Therefore, computer viruses are small programs. They replicate by attaching 【S3】______ a copy of themselves to another program. Once attached by host program, the viruses then look for other programs 【S4】______ to' infect'. In this way, the virus can spread quickly throughout a hard disk or an entire organization. At some points, the situation will be 【S5】______ totally determined by how the virus was programmed. The timing of the attack can be linked to a number of situations, included a certain time 【S6】______ or date, the presence of a particular file, the security privilege level of the user and the number of times a file is used. So-called' benign' viruses might simply display a message, like the one that infected IBM's main computer system last Christmas with a season's greeting. Malignant viruses are designed to damage the system. The attack is to wiping 【S7】______ out data, to delete files or to format the hard disk. There are two main types of viruses: shell and intrusive system. Shell viruses wrap themselves around a host program and don't modify the original program. Shell programs are easy to write, that is why about 【S8】______ half of viruses are of this type. Intrusive viruses invade an existing program and actual insert a portion of themselves into the host program. 【S9】______ Intrusive viruses are hard to write and very difficult to remove with 【S10】______ damaging the host file. 【S1】
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【单选题】在检测起动机时,()是电枢的不正常现象。
A.
换向器与电枢轴之间绝缘
B.
换向器片与电枢铁芯之间的绝缘
C.
各换向器铜片之间的绝缘
D.
换向器表面应洁净无异物
【简答题】用水吸收氨-空气混合气体中的氨,它是属于_____控制的吸收过程
【单选题】在检测起动机时,()是电枢的不正常现象。
A.
各换向器铜片之间的绝缘
B.
换向器表面应洁净无异物
C.
换向器与电枢轴之间绝缘
D.
换向器片与电枢铁芯之间的绝缘
【单选题】在检测起动机时,( )是电枢的不正常现象。
A.
各换向器铜片之间的绝缘
B.
换向器片与电枢铁芯之间的绝缘
C.
换向器表面应洁净无异物
D.
换向器与电枢轴之间绝缘
【简答题】请说明探究式教学模式的特点和教学过程 (请结合具体的物理教学内容举例说明)
【单选题】在检测起动机时,()是电枢的不正常现象。
A.
换向器表面应洁净无异物
B.
换向器与电枢轴之间绝缘
C.
各换向器铜片之间的绝缘
D.
换向器片与电枢铁芯之间的绝缘
【单选题】普天之下,莫非王土;率土之滨,莫非王臣。有苗萋萋,兴雨祁祁,雨我公田,遂及我私。 《诗经·小雅》 材料中的 “遂及我私”的现象是指
A.
统治者将土地分封给诸侯
B.
在公田以外出现了私田
C.
公田里的农产品已私有化
D.
贵族土地所有制的确立
【单选题】《诗经•小雅•北山》中有这样的记载:“普天之下,莫非王土;率土之滨,莫非王臣。”《诗经•小雅•大田》中有这样的记载:“有苗萋萋,兴雨祁祁,雨我公田,遂及我私。”上述材料中出现变化的根本原因在于()
A.
中国由奴隶社会向封建社会过渡
B.
青铜器的制造
C.
铁农具的出现和牛耕的使用
D.
水利工程的兴修
【简答题】水吸收氨 - 空气混合气中的氨,它是属于( )控制的吸收过程
【单选题】在检测起动机时,( )是电枢的不正常现象。
A.
换向器片与电枢轴之间绝缘
B.
换向器片与电枢铁芯之间绝缘
C.
各换向器片之间绝缘
相关题目: