An administrator needs to change a system’s run level from level 2 to level 3. What is the appropriate  method to accomplish this（） A: Use the reboot command. B: Edit the /etc/reboot file and reboot the system. C: Edit /etc/.init.state file and reboot the system. D: Use the telinit command

The high level and low level specified by LVTTL are ________. A: high level 5.0V low level 0V B: high level 3.3V low level 0V C: high level 2.4V~5.0V low level 0V~0.5V D: high level 2.4V~3.3V low level 0V~0.4V

如何定义一个文件读写变量？ A: FILE *file； B: FILE file； C: FILE &file； D: file *file；

You have a FAT32-formatted volume.You need to enable file-level security on the volume. The solution must maintain all files on the volume. What should you do？（） A: Run the sfc.exe command-line tool. B: Run the convert.exe command-line tool.  C: From Disk Management, format the volume and select the NTFS file system. D: From Disk Management, upgrade the disk that contains the volume to a dynamic disk.

创建一个d盘aa文件夹下news.txt文件对象，以下正确的是 A: File file = new File("d:/aa"); B: File file = new File("d:/aa/news.txt"); C: File file = new File("d:/news.txt"); D: File file = new File("d:\aa\news.txt");

Fiction has two levels of understanding, the narrative level and the<br/>authorial level, or the <br/>surface<br/>level and the deep level of understanding.()

Strategic level of goals and plans shape the tactical level and the operational level of goals and plans.

【单选题】享有报价优先推荐和Popular Supplier标识的等级是? A. Level 4 B. Level 1 和 Level 2 C. Level 3 和Level 4 D. Level 1

下列__________说法是正确的？I:File file = new File("input.txt");try (Scanner input = new Scanner(file)) { String line = input.nextLine();}II:try (File file = new File("input.txt"); Scanner input = new Scanner(file);) { String line = input.nextLine();}III:File file;try (file = new File("input.txt"); Scanner input = new Scanner(file);) { String line = input.nextLine();}IV:File file;Scanner input;try (file = new File("input.txt"); input = new Scanner(file);) { String line = input.nextLine();} A: I B: II C: III D: IV

2、To build core competence, a business should work from such aspects as（） A: strategic level B: organizational level C: technological level D: customer level