多项选择题 Which  of the following is mentioned by Shannon in the original 1948 paper " A mathematical theory of communication" ?A、Discrete noiseless systems B、The discrete channel with noise C、mathematical preliminaries D、The continuous channel

单项选择题 ---Did you watch the basketball match on TV last night?    ----I wanted to, but my father ______his favourite TV program. A. watched  B. was watching C. watches D. is watching

单项选择题 A、 B、 C、 D、