【单选题】下图所示电路是一个信号发生器,请按照这个电路图在multisim中搭建一个电路。然后开始仿真,观察波形,依次完成本次作业的各个选择题和填空题。本次实验不用另外提交实验报告。 一、运放U2输出的电压波形是( )。
【单选题】A hundred years later, people learned to use some kind of technology at a factory, but
A.
these training and technology would last only a while.
B.
these training and technology would last all one's life.
C.
these training and technology would last all one's career.
D.
these training and technology were much more developed than before.
【判断题】需求确定与供应规划是采购供应的基础。( )
【单选题】( )是目前材料供应中采用较多的管理办法。
【单选题】Because there weren’t many books, people learned to read.
【单选题】将供应商分为公开竞价型供应商、网络型供应商和供应链管理型供应商,是根据( )的不同划分的。
【判断题】特许经营是一个典型模式,以统一的品牌名建立一个全国连锁加盟,但所有权和控制权属于地方。()