【多选题】以下关于组合逻辑电路和时序逻辑电路说法正确的是( )
A.
组合逻辑电路任何时刻的输出只取决于该时刻的输入信号,与电路原来的状态无关
B.
时序逻辑电路的输出不仅与当时的输入信号有关,而且与电路原来的状态有关,存在记忆单元。
C.
时序逻辑电路可以没有输入信号,组合逻辑电路必须有输入信号
【简答题】Only when we had finished all the work __________(we realize) that it wwas too late to take a bus hom.
【单选题】与传统化油器发动机相比,装有电控燃油喷射系统的发动机提高了( )性能。
【单选题】Let's ________ a bus to the park. [ ]
【单选题】I think it'll be a good way _____ to the theatre. [ ]
【简答题】根据下面材料,回答第 21~25 题: 第 21 题 What's the reason that Germany's chimney sweeps are Under attack?( )
【单选题】【英语 [ 单选题 ] 】 The bookshop is far away. You'd better__________ . A. by the bus B. take the bus C. by bus D. take bus