[多选] In the communications industry, what are the features and benefits of using the layered OSI model?（）

《电子商务示范法》已经脱离了纯（）的立场，实际上是将（）与（）结合起来，这有助于提高电子签名的安全程度。 简述我国实行部门预算的必要性。 用抗人血红蛋白血清检验呈阳性结果表明检材（）。 肯定含有血；。 可能含有血；。 含有人血；。 含有人的蛋白质。。 You are the network administrator for You administer a Windows Server 2003 computer named TestKing2. contains a shared folder named TestKingProjects. You use the Backup utility once each day to back up the TestKingProjects folder. You discover that a database file in the TestKingProjects folder is corrupt. You confirm that the file corruption is not the result of a virus. You need to replace the corrupted file by using the latest backup. You do not know whether the file was corrupted before or after the latest backup was completed. You need to verify that the file in the backup can be opened successfully before you overwrite the existing file. What should you do?（） In the Backup utility, select the Verify data after backup option.。 Run the Ntbackup \\TestKing2\TestKingProjects /v:yes command.。 Restore the file to a temporary folder. Verify that the database file contains the correct data. Copy the restored file to the TestKingProjects folder.。 Restore the file to a temporary folder. Use the Windiff utility to compare the file in the temporary folder to the file in the TestKingProjects folder. Copy the restored file to the TestKingProjects folder.。 关于井距的确定，下面错误的说法是（）。 井距主要取决于井的出水量。 井距过大时，单井负担的灌溉面积过大，作物得不到灌溉保证。 井距与所能灌溉的面积无关。 井距过小时，抽水时会产生机井间的强烈干扰。 In the communications industry, what are the features and benefits of using the layered OSI model?（）