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【单选题】
电子签名最主要的应用方法是A.
RSA签名
B.
DSS签名
C.
Hash签名
D.
DES签名
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举一反三
【简答题】第2次课,课堂练习1(在超星学习平台上完成,提交程序代码或手写代码照片) 时间:15分钟 1)参考电子教材103页文件3-18,104页文件3-19,定义一个Student类,在该类中定义一个班级名称静态成员变量(String类型) 2)定义两个静态方法,分别为void classBegin()和void doExercises() 3)classBegin()方法打印出:同学们开始上课。 4)d...
【单选题】In the relation of tblHire (Loan_Num, ember_Id,Video_Code,Hire_Period, Issue_Date,Due_Date,Return_Date, Reminded,Fine,Paid), Which SQL statements can find the average fine(s) by member where the avera...
A.
select Member_Id , AVG ( Fine ) as Average_Fine from tblHire group by Member_Id where AVG ( Fine )> 16 ;
B.
select Member_Id , AVG ( Fine ) as Average_Fine from tblHire group by Member_Id having AVG ( Fine )> 16 ;
C.
select Member_Id , average ( Fine ) as Average_Fine from tblHire group by Member_Id having average ( Fine )> 16 ;
D.
select Member_Id , AVG ( Fine ) as Average_Fine from tblHire order by Member_Id having AVG ( Fine )> 16 ;
【单选题】What will be the output of the following Python code? s=["pune", "mumbai", "delhi"] [(w.upper(), len(w)) for w in s]
A.
Error
B.
[‘PUNE’, 4, ‘MUMBAI’, 6, ‘DELHI’, 5]
C.
[PUNE, 4, MUMBAI, 6, DELHI, 5]
D.
[(‘PUNE’, 4), (‘MUMBAI’, 6), (‘DELHI’, 5)]
【简答题】课堂学习代码: SharedPreference.rar 要求提交作业: 学号-姓名.doc 提交作业后可以下载答案附件进行学习。 作业要求: 1、如下图,创建两个工具类,FileSaveQQ用来实现文件外部存储,SPSaveQQ用来实现SharedPreferences的存储。 2、需要运行截图: (1)外部存储申请权限 (2)外部存储保存成功的文件 (3)SharedPreferences存储...
【简答题】?LEN(“计算机”)＜LEN(“COMPUTER”)=【 】。
【单选题】What will be the output of the following Python code? a=["Apple","Ball","Cobra"] a.sort(key=len) print(a)
A.
[‘Apple’, ‘Ball’, ‘Cobra’]
B.
[‘Ball’, ‘Apple’, ‘Cobra’]
C.
[‘Cobra’, ‘Apple’, ‘Ball’]
D.
Invalid syntax for sort()
【简答题】Determine Θ for the following code in the average case. Assume that all variables are of type int.
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