多項選擇題在Windows9X中,為保護(hù)文件不被修改,可將它的屬性設(shè)置為()。

A.只讀
B.存檔
C.隱藏
D.系統(tǒng)


您可能感興趣的試卷

你可能感興趣的試題

1.多項選擇題下列四項中屬于微型計算機(jī)主要性能指標(biāo)的是()。

A.字長
B.內(nèi)存容量
C.重量
D.時鐘脈沖

2.多項選擇題下列關(guān)于計算機(jī)系統(tǒng)軟件的四條敘述中,不正確的是()。

A.系統(tǒng)軟件與具體應(yīng)用領(lǐng)域無關(guān)
B.系統(tǒng)軟件與具體硬件邏輯功能無關(guān)
C.系統(tǒng)軟件是在應(yīng)用軟件基礎(chǔ)上開發(fā)的
D.系統(tǒng)軟件并不具體提供人機(jī)界面

3.多項選擇題下列關(guān)于計算機(jī)病毒的四條敘述中,正確的是()。

A.計算機(jī)病毒是一個標(biāo)記或一個命令
B.計算機(jī)病毒是人為制造的一種程序
C.計算機(jī)病毒是一種通過磁盤、網(wǎng)絡(luò)等媒介傳播、擴(kuò)散,并能傳染其它程序的程序
D.計算機(jī)病毒是能夠?qū)崿F(xiàn)自身復(fù)制,并借助一定的媒體存的具有潛伏性、傳染

4.多項選擇題下列四項內(nèi)容中,屬于Internet(因特網(wǎng))基本功能是()。

A.電子郵件
B.文件傳輸
C.遠(yuǎn)程登錄
D.實時監(jiān)測控制

5.多項選擇題下列()屬于計算機(jī)的高級語言。

A.BASIC
B.C語言
C.匯編語言
D.PASCAL

最新試題

翻譯:The first step in planning a well should be the gathering of all available data on past wells. In this respect it is important to be completely familiar with all sources of information, the availability of the sources, and the information normally associated with each source.

題型:問答題

翻譯:crude petroleum is not an equilibrium mixture, and on a geological time scale its composition is slowly changing. S.R.silverman found that heating at 121C for two weeks caused detectable changes, the low-molecular-weight components formed being isotopically lighter so far as the carbon was concerned, than the original.

題型:問答題

翻譯:The primary limitations for gas lift operations are the lack of formation gas of an outside source of gas, wide well spacing, and available space for compressors on off-shore plat forms. Generally, gas lift is not applicable to single-well installations and widely spaced wells that are not suited for a centrally located power system.

題型:問答題

翻譯:Other additives are often added to the fracturing fluids for special proposes. Corrosion inhibitors may be used if the fracturing fluids might cause corrosion in the tubular goods in the well.Other additives are used to make the part of the fracturing fluid which is moving against the pipe walls behave almost like lubricating oil while the remaining fracturing fluid take an almost solid form to carry the maximum amount of proppant.

題型:問答題

翻譯:This chapter deals with the fundamental properties of reservoir rocks. The properties discussed are (1) porosity - a measure of the void space in a rock; (2) Permeability - a measure of the fluid transmissivity of a rock; and (3) fluid saturation - a measure of the gross void space occupied by a fluid. These properties constitute a set of fundamental parameters by which the rock may be described quantitatively.

題型:問答題

翻譯:The application of physics to the study of rocks (geophysics)is very important in petroleum geology. In its broadest application geophysics makes a major contribution to understanding the earths crust and, especially through the application of modern plate tectonic(板塊構(gòu)造)theory, the genesis and petroleum potential of sedimentary basins. More specially, physical concepts are required to understand folds(褶皺), faults(斷層), and diapers(底辟), and hence their roles in petroleum entrapment.

題型:問答題

翻譯:Gas lift is the method of artificial lift that uses an external source of high-pressure gas for supplementing formation gas to lift the well fluids. The primary consideration in the selection of availability and compression cost of gas.

題型:問答題

翻譯:A major oil company usually initiates the sequence of events that leads to the drilling of oil and gas wells in foreign fields, but independent oil operators pay for most of the wells in the United States. In fact, about 80% of all wells drilled in the U.S. today are financed by independents.

題型:問答題

翻譯:If Colonel Drake, Uncle Billy smith , Anthony Lucas , and the untold thousands of other members of the fraternity of drilling pioneers were alive today , they would no doubt be fascinated and amazed by the proliferation of drilling tools and techniques that have been developed since those primitive days in Pennsylvania and Texas . Undoubltly , they would also be impress by the great numbers of drilling rigs at work today-------over two thousand in the USA alone.

題型:問答題

翻譯:An acidizing treatment for a sandstone formation normally will consist of sequentially injecting three fluids---a preflush, the hydrofluoric acid hydrochloric acid mixture, and an after flush. These fluids serve definite purposes.

題型:問答題