【简答题】耦合电感 L 1 = L 2 = 3H ,耦合因数 ,则互感 M 为 ( ) 。
【单选题】已知两耦合电感L1=L2=6H,互感M=3H,则耦合系数k=( )。
【单选题】The writers of the early immigrant literature are _________.
【单选题】Roald Dahl was a great children's writer. His dark past helped him paint a picture ________ was different to most other writers.
【简答题】二、不定项选择题(每小题6分,共18分。每小题给出的四个选项中,有的只有一个选项正确。有的有多个选项正确,全部选对的得6分,选对但不全的得3分,选错或不答的得0分)
【简答题】奥迪参加勒芒24小时耐力赛的赛车是: ; 。