【判断题】广域网(Wide Area Network,WAN)可以跨接全球。
【单选题】若电源供电给电阻时,电压源和电阻值均保持不变,为了使电源输出功率最大,应调节内阻值等于( )
【单选题】下极限偏差数字的字号应比公称尺寸数字的字号
【简答题】即时制的英文缩写是JIT,那其英文全称是( )
【单选题】The area is ______ with trails, some as wide as boulevards, that have been cut and maintained by elephant.