静摩擦
You work as a database administrator for Certkiller .com. You want to be notified when the number of disk I/O increases by 10% of what it was yesterday. You create a baseline metric for yesterday’s disk I/O performance. How do you use the baseline metrics to achieve your objective？（） Save the baseline in the database。 Save the baseline in the Database Control Home Page。 Create a procedure to read and apply the baseline to disk I/O metrics。 Apply the baseline to the disk I/O metrics in the Mange Metrics page。 Alter the disk I/O metrics to include baseline by using the ALTER METRICScommnd。
消费者认为产品的实际效用未必抵得上消费者所支付价格的风险是（） 功能风险。 安全风险。 经济风险。 社会风险。
对于各种助行器的选择，下列哪项描述不妥：（） 手杖：上臂自然下垂，屈肘45°掌心到地面的垂直距离。 腋杖：小趾前外侧15cm，到腋窝的距离，屈肘45°，腕前处为把手位置。 轮椅：宽度为患者臀侧与轮椅座位内侧面的距离为2.5cm。 上半身功能好者，轮椅靠背上缘高度应患者腋下10cm。 轮椅座垫与脚踏板之间的距离以患者坐好后，双脚放在脚踏板上，腘窝处大腿前端底部约有4cm不接触座垫。
You executed the following command in Recovery Manager （RMAN） against your Oracle 10g database：RMAN> REPORT NEED BACKUP days 3；What would be the output of this command？（） a list of files that require a backup within three days。 a list of files that have not been backed up for three days。 a list of files that RMAN recommends be backed up only once in every three days， based on low volatility。 a list of files for which a backup has already been performed and may need a backup after three day。
女性，42岁，体重60kg，烧伤后3h送至医院。右上肢水肿明显，剧烈疼痛，有较大水疱；双下肢（不包括臀部）无水疱，皮肤焦黄色，触之不痛，如皮革样。该患者的烧伤深度为（）
