一个视图和一组灯光能组成一个场景。用户可以在AutoCAD的图形文件中建立()场景。
A、3个
B、5个
C、不超过20个
D、无数个
设窗体上有一个名为Text1的文本框和一个名为Command1的命令按钮,并有以下事件过程:程序运行时,如果在文本框中输入-5,则单击命令按钮后的输出结果是( )。
A、5
B、20
C、25
D、输入错误
You executed the following code: SQL> CERATE TABLE COUNTRY (COUNTRY_ID CHAR(2) CONSTRAINT COUNTRY_ID_nn NOT NULL, COUNTRY_NAME VARCHAR2(20), CURRENCY_NAME VARCHAR2(20), CONSTRAINT COUNTRY_ID_PK PRIMARY KEY (COUNTRY_ID)) ORGANIZATION INDEX; Which types of tables will be created automatically?()
A、 journal table
B、 clustered table
C、 mapping table
D、 partitioned table
Given: What is the result?()
A、 test
B、 Exception
C、 Compilation fails.
D、 NullPointerException
You configured the large pool for Oracle backup and restore operations. As a result, which component would require less memory?()
A、 streams pool
B、 shared pool
C、 log buffer
D、 keep buffer cache
E、 recycle buffer cache
用下表数据计算(以美元为单位),花费的百分比是:()
A、40%
B、50%
C、60%
D、83%