起重机所有带电设备的外壳、电线管等均应可靠接地。接地线可用截面不小于75mm2的扁钢，（）的铜线，或30mm2的圆钢。 ["15mm²","12mm²","10mm²","8mm²"]
如果滴状血痕的边缘出现了明显的锯齿状突起，滴落距离一般为：（） ["0.1米","0.3米","0.5米","1米以上"]
大流士
You have a file server that runs Windows Server 2008. You configure quotas on the server. You need to view each users quota usage on a per folder basis. What should you do？（） [" From File Server Resource Manager， create a File Screen"," From File Server Resource Manager， create a Storage Management report."," From the command prompt， run dirquota.exe quota list."," From the properties of each volume， review the Quota Entries list."]
跨度为8m的预制梁脱模起吊时混凝土强度允许值应达到（）。 ["A.40% ","B.50% ","C.65% ","D.75%"]
A公司2007年12月31日“持有至到期投资”账户的余额60 000元，其中1年内到期的金额10 000元。则填列资产负债表的“持有至到期投资”项目时，应填列的金额为（）。
