【单选题】意识概念本身很复杂,它可以从不同角度进行理解。以下四项中错误的理解是()。
【单选题】以程序控制为基础的计算机结构是由 ( ) 最早提出的。
【单选题】以程序控制为基础的计算机结构是由( )最早提出的。
【单选题】以程序控制为基础的计算机结构是由( )最早提出的。
【单选题】V-M 直流调速系统中采用了平波电抗器来抑制电流脉动,改善( )问题。
【单选题】V-M 直流调速系统中采用了平波电抗器来抑制电流脉动,改善( )问题。
【单选题】Passage Two Questions 61 to 65 are based on the following passage: Today air travel is very common, but the first flights were very different from today. When air travel began in the 1920s, it was ver...
A.
Because it was too expensive.
B.
Because it was too uncomfortable.
C.
Because it was too dangerous.
D.
Because it was too noisy.
【单选题】But most travel is decidedly ( ). Only corporate travel, about 30% of trips over 50 miles, is truely compulsory.