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Linux发行版本有：()
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前目录/home/lisa下有一个shell脚本prog.它的权限是rwxr-xr-x.如果在命令行运行prog,得到""Command not found"".下面那些说明是正确的()
在大多数Linux发行版本中，一下那个属于块设备（block devices）()。
下面命令的作用是()。setPS1="[uwt]\$",exportPS1
A-In December of 1869， Congress appointed a commission to select a site and prepareplans and cost estimates for a new State Department Building. The commission was also toconsider possible arrangements for the War and Navy Departments To the horror of some whoexpected a Greek Revival twin of the Treasury Building to be erected on the other side of the White House， the elaborate French Second Empire style. design by Alfred Mullett was selected，and construction of a building to house all three departments began in June of 1871
B-Completed in 1875， the State Department ‘s south wing was the first to be occupied，with its elegant four-story library （completed in 1876）， Diplomatic Reception Room， andSecretary’s office decorated with carved wood， Oriental rugs， and stenciled wall patterns The Navy Department moved into the east wing in 1879， where elaborate wall and ceilingstenciling and marquetry floors decorated the office of the Secretary.
C-The State， War， and Navy Building， as it was originally known， housed the threeExecutive Branch Departments most intimately associated with formulating and conducting thenation‘s foreign policy in the last quarter of the nineteenth century and the first quarter of thetwentieth century-the period when the United States emerged as an international power.The building has housed some of the nation’s most significant diplomats and politicians and has beenthe scene of many historic events .
D-Many of the most celebrated national figures have participated in historical events thathave taken place within the EEOB‘s granite walls Theodore and Franklin D Roosevelt，William Howard Taft， Dwight D Eisenhower， Lyndon B Johnson， Gerald Ford， and GeorgeH W Bush all had offices in this building before becoming president It has housed 16Secretaries of the Navy， 21 Secretaries of War， and 24 Secretaries of State Winston Churchillonce walked its corridors and Japanese emissaries met here with Secretary of State Cordell Hullafter the bombing of Pearl Harbor.
E-The Eisenhower Executive Office Building （EEOB） commands a unique position in boththe national history and the architectural heritage of the United States Designed by SupervisingArchitect of the Treasury， Alfred B Mullett， it was built from 1871 to 1888 to house thegrowing staffs of the State， War， and Navy Departments， and is considered one of the bestexamples of French Second Empire architecture in the country.
F-Construction took 17 years as the building slowly rose wing by wing.When the EEOBwas finished， it was the largest office building in Washington， with nearly 2 miles of black andwhite tiled corridors Almost all of the interior detail is of cast iron or plaster； the use of woodwas minimized to insure fire safety Eight monumental curving staircases of granite with over 4，000 individually cast bronze balusters are capped by four skylight domes and two stained glassrotundas.
G-The history of the EEOB began long before its foundations were laid The first executiveoffices were constructed between 1799 and 1820.A series of fires （including those set by theBritish in 1814） and overcrowded conditions led to the construction of the existing TreasuryBuilding In 1866， the construction of the North Wing of the Treasury Building necessitated thedemolition of the State Department building.
41 -＞ C -＞ 42 -＞ 43 -＞ F -＞ 44 -＞ 45
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