【判断题】( )一般情况下半闭环控制系统的精度高于开环系统,但低于闭环系统。
【单选题】He is____ friend of____ writer’s.
【判断题】一般情况下半闭环控制系统的精度高于开环系统
【判断题】( )一般情况下半闭环控制系统的精度高于开环系统。
【单选题】The writer cites Jascha Heifetz's example mainly because ______.
A.
he is a skillful violinist
B.
he quits the concert stage at his peak
C.
he ends every show gracefully
D.
he is adorned by his audience
【单选题】The writer's real trouble was that
A.
he couldn't speak the language
B.
he followed the policeman's direction
C.
he took the wrong, bus
D.
he left the town-centre
【判断题】一般情况下半闭环控制系统的精度高于开环系统。
【单选题】在1949年制定的,正式确立中国共产党在全国执政地位的法律文献是()
【单选题】What was the writer's opinion of the psychologist?
A.
He was inefficient at his job.
B.
He was unhappy with his job.
D.
He was very aggressive.