单一磁铁矿矿石，组成结构简单，绝大部分为强磁性矿物，常采用（）方法选别。 ["强磁选","弱磁选","浮选","重选"]
《动车组列车服务质量规范》高铁快件集装件按装载方案指定位置码放；单节车厢装载的集装件总重量不超过列车允许载重量（二等座车厢标记定员乘以80千克）。
出乘请领票据不足，但能及时按章处理（中途借票）未影响运输收入，属于（）问题。 ["红线","A1","A2","B"]
Which feature would prevent guest users from gaining network access by unplugging an IP phone andconnecting a laptop computer？（） ["IPSec VPN","SSL VPN","port security","port security with statically configured MAC addresses","private VLAN"]
控制元件在液压系统中控制和调节液体的（） ["压力","流量","方向","以上均正确"]
EIGRP中traffic-share balanced命令是什么意思？
