D: There are
正确答案: B
(单选题)6: In the form of ( ) the output is continuously fed back and compared with the reference input.
A: continuous control
B: discontinuous control
A: Either will do
B: Yes, I like meat
C: Yes, I like fish
D: No, they are not my favorite
正确答案: A
(单选题)4: Tom didn’t come to class yesterday. He (_______) ill.
A: invent
B: imagine
C: create
D: discover
正确答案: C
(单选题)15: 1
A: A
B: B
C: C
D: D
正确答案: B
(单选题)16: The toy boat turned over and sank to the (_______) of the pool.
A: base
B: depth
C: ground
D: bottom
正确答案: D
(单选题)17: He (_______) the children so badly that they were terrified of him.
A: behaved
B: treated
C: dealt
D: acted
(单选题)1: She would make a teacher far (_______) to the average.
A: superior
B: better
C: favorable
D: popular
正确答案: A
(单选题)2: The system's characteristic equation can be used to determine _____ of a linear time-invariant system.
B: high-level programming language
C: a programming language connected with the computer hardware behavior
D: an assembly language
正确答案: B
(单选题)13: The generator voltages are usually stepped up to the transmission voltage level by ( ).
D: Mine wasn’t
正确答案: A
(单选题)8: A transformer is a device that can convert one ac voltage to another ac voltage through the action of _____.
A: an electric circuit
A: must be
B: should be
C: must have been
D: should have been
正确答案: C
(单选题)5: ________ a concert next Saturday?
A: There will be
B: Will there be
C: There can be
A: series capacitor
B: parallel reactors
C: step-up transformers
D: step-down rs
正确答案: C
(单选题)14: Lenin stressed that it is precisely the people who (_______) history.
B: expired
C: ended
D: terminated
正确答案: B
(单选题)10: I like to get up early so that I can get plenty of work (_______) before lunch.
A: done
B: being done
C: to do
B: the inverse Laplace transform
C: the Fourier transform
D: the Laplace transform
正确答案: B
(单选题)12: Delphi belongs to _____.
A: low-level programming language
C: discrete-data control
D: sampled-data control
正确答案: A
(单选题)7: My motorcar was stolen.
----- (_______) .
A: I’m sorry to hear that
B: It doesn’t matter
C: everybody knew
B: a magnetic field
C: an electric field
D: a coupling circuit
正确答案: B
(单选题)9: My passport (_______) last month, so I will have to get a new one.
A: elapsed
D: to be done
正确答案: A
(单选题)11: In the root-locus method the actual time response of a system can be obtained by means of _____.
A: the inverse Fourier transform
A: the stability
B: magnitude of the steady-state error
C: the controllability
D: the observability
正确答案: A
(单选题)3: What would you like to have, meat or fish? --- (_______) .