有机肥料所含养分状况属于迟效态,必须经过腐熟分解,才能转化为()为植物吸收利用。
A. 有效态
B. 无效态
C. 液态
D. 气态
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以下不属于离心水泵启动先必须检查的内容是()
A. 水泵与电动机固定是否良好,螺栓有无松动和脱落
B. 用手盘动靠背轮水泵转子应转动灵活,内部无摩擦和撞击声
C. 检查冷却水是否畅通
D. 对于新安装或检修后的水泵,必须检查电动机转动的方向是否正确
You have a file server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2). All client computers run Windows XP Professional Service Pack 3 (SP3). The IP configuration for Server1 is shown in the following table.You replace the network card on Server1. You configure the new network card to use the existing IP configuration.Users reports that they receive a time-out error message when they connect to Server1. You need to ensure that users can immediately connect to Server1. Which command should you instruct users to run?()
Arp –d 172.16.90.13
B. Ipconfig /flushdns
C. Nbtstat –R
D. Netstat –r 172.16.90.13
关于钢筋混凝土框架结构,以下判断中错误的一个是()
A. 梁铰机制优于柱铰机制;
B. 弯曲破坏优于剪切破坏;
C. 大偏压破坏优于小偏压破坏;
D. 结点破坏优于梁段破坏。
已知某高炉有效容积350m3,高炉利用系数为3.5,该高炉喷煤量每小时6t,求该高炉喷煤比?