一、单选题（共 50 道试题，共 100 分。）V
1. An electric heater draws 10 A from a 120V line. The resistance of the heater is _____.
A. 1200Ω
B. 120Ω
C. 12Ω
D. 1.2Ω
满分：2 分
2. In the root-locus method the actual time response of a system can be obtained by means of _____.
A. the inverse Fourier transform
B. the inverse Laplace transform
C. the Fourier transform
D. the Laplace transform
满分：2 分
3. Some schools teach but fail to (_______) their students.
A. educate
B. instruct
C. enlighten
D. editorial
满分：2 分
4. Finally, the teacher realized that the girl was crying ____.
A. because what he had said
B. because that he had said
C. because of what he had said
D. because of that he had said
满分：2 分
5. We are going to have a dancing party tonight. Would you like to join us? ---- (_______) .
A. I'm afraid not. Because I have an appointment with my dentist tonight
B. Of course not. I have no idea
C. No, I can‘t
D. That‘s all set
满分：2 分
6. When John came in, she (_______) her talk with Linda and talked to him.
A. broke off
B. called off
C. carrird off
D. passes out
满分：2 分
7. It is reported that two cars (_______) into each other this morning on the highway, killing both driver and two passengers.
A. crawled
B. crouched
C. pressed
D. crashed
满分：2 分
8. A computer printer is _____ device that produces computer-generated text or graphical images on paper.
A. an input
B. an output
C. a storage
D. a data processing
满分：2 分
9. They took the injured straight to the hospital. Otherwise some of them (_______) ．
A. might have died
B. might die
C. would die
D. could die
满分：2 分
10. I _____on a sofa because my parents have come for the weekend.
A. slept
B. was sleeping
C. have slept
D. am sleeping
满分：2 分
11. Any protection scheme consists basically of _____.
A. two elements
B. three elements
C. four elements
D. five elements
满分：2 分
12. Beijing is one of _____ cities in China.
A. large
B. larger
C. the largest
D. largest
满分：2 分
13. We have come to a critical moment. You must take immediate (_______) .
A. act
B. action
C. activity
D. doings
满分：2 分