Youneedtorestoreyourdatabasebackto9/30/2008at18:00.Inwhatorderwouldyourunthefollowingcommandstocompetethistask?()a.restorecontrolfileuntiltime`09/30/2008:18:00:00’b.restoredatabaseuntiltime`09/30/2008:18:00:00’c.restorespfileuntiltime`09/30/2008:18:00:00’

题目

Youneedtorestoreyourdatabasebackto9/30/2008at18:00.Inwhatorderwouldyourunthefollowingcommandstocompetethistask?()a.restorecontrolfileuntiltime`09/30/2008:18:00:00’b.restoredatabaseuntiltime`09/30/2008:18:00:00’c.restorespfileuntiltime`09/30/2008:18:00:00’d.recoverdatabaseuntiltime`09/30/2008:18:00:00’e.alterdatabaseopenresetlogsf.alterdatabaseopen

A.b,d,e

B.b,d,f

C.c,a,b,d,e

D.c,a,b,d,f

E.a,b,d,e


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  • 第1题:

    氢火焰离子化检测器通常使用的氮气一氢气一空气的流量比是

    A.3:30:300
    B.30:30:30
    C.30:30:100
    D.30:10:300
    E.30:30:300

    答案:E
    解析:

  • 第2题:

    如图所示支导线,AB边的坐标方位角为αAB=125°30′30″,转折角如图,则CD边的坐标方位角αCD为()

    A.75°30′30"
    B.15°30′30"
    C.45°30′30"
    D.25°30′30"

    答案:B
    解析:
    根据α+180°±β左右,可以计算求得。

  • 第3题:

    4、与像素(30,30,40)的色调相同的像素是

    A.(20,20,30)

    B.(30,40,30)

    C.(30,30,20)

    D.(20,70,30)


    (20,20,30)

  • 第4题:

    如图所示支导线,AB边的坐标方位角为αAB=125°30′30″,转折角如图,则CD边的坐标方位角αCD为()

    A:75°30′30"
    B:15°30′30″
    C:45°30′30"
    D:25°29′30′

    答案:B
    解析:
    根据α+180°±β左右,可以计算求得。

  • 第5题:

    已知在观测单一角度时,终边的读数为145°30′30″,起始边的读数为45°00′00″,则该水平角为?

    A.100°30′30″

    B.260°30′30″

    C.-100°30′30″

    D.-260°30′30″


    260 ° 30 ′ 30 ″