题目内容

设X服从λ=2的泊松分布,则x的数学期望和方差分别是多少?

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《中华人民共和国行政许可法》确立了许可听证中的记录排他原则。()

1.classAimplementsrunable(
2.inti;
3.publicvoidrun()(
4.try(
5.thread.sleep(5000);
6.i=10;
7.)catch(InterruptedExceptione){}
8.)
9.)
10.
11.publicclassTest{
12.publicstaticvoidmain(stringargs)(
13.try(
14.Aa=newA();
15.Threadt=newThread(a);
16.t.start();
17.
18.intj=a.i;
19.
20.)catch(Exceptione){}
21.)
22.)
Whichstatementalline17willensurethatj=10atline19?()

元朝对“恤囚”制度的发展。

YourARCHIVELOG-modedatabasehaslostthreedatafilesandshutdown.OneisassignedtotheSYSTEMtablespaceandtwoareassignedtotheUSERStablespace.Youcanchoosefromthefollowingstepstorecoveryourdatabase:
a.Restorethethreedatabasedatafilesthatwerelost.
b.IssuetheStartupMountcommandtomountthedatabase.
c.Issuethealterdatabaseopencommand.
d.Issuethealterdatabaseopenresetlogscommand.
e.Recoverthedatabaseusingtherecoverdatabasecommand.
f.Recoverthedatafileswiththerecoverdatafilecommand.
g.Takethedatafilesoffline.
Whichisthecorrectorderofthesestepsinthiscase?()

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