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【单选题】
关于网状数据库,以下说法正确的是()A.
只有一个结点可以无双亲
B.
每个结点有且只有一个双亲
C.
两个结点之间只能有一种联系
D.
一个结点可以有多于一个的双亲
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【单选题】Positive surprises from government reports on retail sales, industrial production, and housing in the past few months are leading economists to revise their real gross domestic product forecasts upwar...
A.
their government is announcing the end of a recession.
B.
US economy is showing some signs of an upturn so soon.
C.
some economic sectors have become leading industries.
D.
they have to revise the product forecasts so often.
【简答题】计算机启动时,首先运行BIOS中的程序,测试计算机中硬件的工作状态_____。
【简答题】一家集团公司有12家子公司,每家子公司又有4个部门。上级给出一个172.16.0.0/16的网段,给每家子公司以及子公司的部门分配网段。
【简答题】一家集团公司有12家子公司,每家子公司又有4个部门。上级给出一个172.16.0.0/16的网段,让给每家子公司以及子公司的部门分配网段。
【单选题】Examination compositions, together with most business letters and government reports, are the main situations ____ formal language is used.
A.
in which
B.
on which
C.
of which
D.
for which
【简答题】Text 3Positive surprises from government reports on retail sales, industrial production, and housing in the past few months are leading economists to revise their real gross domestic product (GDP) for...
【简答题】Government reports, examination compositions, legal documents and most business letters are the main situations ________ formal language is used. A) in which B) on which C) in that D) at what
【简答题】一家集团公司有 12 家子公司,每家子公司又有 4 个部门。上级给出一个 172.16.0.0/16 的网段,让给每家子公司以及子公司的部门分配网段。
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