在车床两顶尖间车细长轴外圆,若只考虑工件刚度,则加工后会产生的误差是()。
A. 尺寸误差
B. 形状误差
C. 位置误差
D. 尺寸和形状误差
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2000版ISO9000族标准只有4个。
A. 正确
B. 错误
分包单位的任何违约均被视为乙方的违约。
A. 正确
B. 错误
外科急性感染中,"β溶血性链球菌从皮肤、黏膜的细小伤口入侵所致。是皮肤及其网状淋巴管的急性炎症,感染蔓延很快,很少有组织坏死或化脓"属于()外科急性感染中,"一个毛囊及其所属皮脂腺的急性化脓性感染,常扩展到皮下组织"属于()外科急性感染中,"多个疖同时或反复发生在身体各部,称为常见于营养不良的小儿或糖尿病患者"属于()外科急性感染中,"是多个相邻的毛囊及其所属皮脂腺或汗腺的急性化脓性感染,或由多个疖融合而成。颈部痈俗称’对口疮’。糖尿病患者易患此病"属于()外科急性感染中,"皮下、筋膜下、肌间隙或深部蜂窝组织的急性弥漫性化脓性感染。其特点是病变不易局限,扩散迅速,与正常组织无明显界限"属于()
A. 疖
B. 痈
C. 丹毒
D. 疖病
E. 急性蜂窝织炎
You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database named DB1 in the instance. The latest differential backup is performed at 15:30, the full back up was performed at 13:30, and database snapshots were created at 16:30 and at 17:30. The backups and the database snapshots are stored on a different disk from the database files. At 17:05, the hard disk containing the database files fails at 17:02 hours. You must restore DB1 while reduce data loss to the least. So what action should you perform to achieve this goal?()
A. You should restore the full backup
B. You should restore the database snapshot from 16:30 hours.
C. You should restore the database snapshot from 17:30 hours
D. You should restore both the full backup and the differential backup.&e