CPC30型叉车变速器采用的是（）齿轮机械换挡变速器。 锥形。 直条。 滑动。 斜。
How does a DHCP server dynamically assign IP addresses to hosts?（） Addresses are permanently assigned so that the host uses the same address at all times.。 Addresses are assigned for a fixed period of time. At the end of the period, a new request for an address must be made, and another address is then assigned.。 Addresses are leased to hosts. A host will usually keep the same address by periodically contacting the DHCP server to renew the lease.。 Addresses are allocated after a negotiation between the server and the host to determine the length of the agreement.。
国务院（）年下发的文件，标志着我国新一轮“菜篮子”工程的开始。 2006。 2008。 2009。 2010。
简述应如何进行采购计划执行的监控？
《铁路客运运价里程表》中，接算站示意图中，接算站用（）圆圈表示。 黑色。 红色。 绿色。 黄色。
隋朝时期，涿郡货物经水路运输抵长安须经路线是（）。
