1. An electric heater draws 10 A from a 120V line. The resistance of the heater is _____.
A. 1200 B. 120 C. 12 D. 1.2
正确答案：C 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 transformB. the inverse Laplace transformC. the Fourier transformD. the Laplace transform
正确答案：B 满分：2 分
3. Some schools teach but fail to (_______) their students.
A. educateB. instructC. enlightenD. editorial
正确答案：A 满分：2 分
4. Finally, the teacher realized that the girl was crying ____.
A. because what he had saidB. because that he had saidC. because of what he had saidD. because of that he had said