凡是由于非主要经营业务而发生的各种应收款项，以及虽因主要经营业务而发生但采用了票据化表现形式的应收款项，均不属于应收账款的范围。
生物细胞的80％是（）。 核酸。 蛋白质。 水。 糖。
某企业本月大修理机器设备，领用材料8000元，支付外单位修理工资18000元，款已转帐支付。
若该厂每年大修一次，试编制有关会计分录。
刷模
使用冷粘法时，对接缝口处进行封严的密封材料的宽度不应小于（）。 A.5mm 。 B.10mm 。 C.15mm 。 D.20mm。
The Schuyler and Livingston Iron Works has been working on getting its network security undercontrol. It has set up VPN with IPSec links to its suppliers. It has installed network vulnerabilityscanners to proactively identify areas of weakness， and it monitors and responds to securityevents as they occur. It also employs extensive access control lists， stateful firewall implementations， and dedicated firewall appliances. The company has been growing very fastlately and wants to make sure it is up to date on security measures. Which two areas of securitywould you advise the company to strengthen？ （）
