信息科学与电子工程业英语课第一单元答案.doc

科技英语课件 Exercises Unit 1 Exercises (1) Translate the following sentences into Chinese. 1. As with series resonance, the greater the resistance in the circuit the lower the Q and, accordingly, the flatter and broader the resonance curve of either line current or circuit impedance. 对于串联谐振，电路中的电阻愈大Q值就愈低，相应地线路电流或电路阻抗的谐振曲线也就愈平、愈宽。 2. A wire carrying a current looks exactly the same and weighs exactly the same as it does when it is not carrying a current. 一根带电的导线其外表与重量都与不带电导线完全一样。 3. Click mouse on the waveform and drag it to change the pulse repetition rate, or directly enter a new value of the period in the provided dialogue box, while keeping the pulse width unchanged. 在波形上点击鼠标并拖动来改变脉冲重复频率，或者在提供的对话框中直接输入新的周期值，而保持脉冲宽度 HMILYYLIMH 1 不变。 4. Electronics is the science and the technology of the passage of charged particles in a gas, in a vacuum, or in a semiconductor. Please note that particle motion confined within a metal only is not considered electronics. 电子学是一门有关带电粒子在气体、真空或半导体中运动的科学技术。注意，在本书中粒子运动仅限于金属的情况不属于电子学。 5. Hardware technologies have played vital roles in our ability to use electronic properties to process information, but software and data processing aspects have not developed at the same speed. 硬件技术在我们使用电子特性来处理信息的能力中一直起着重要作用，而软件及数字处理方面却没能与硬件同步发展。 6. However, in a properly designed DC amplifier the effect of transistor parameter variation, other than Ico, may be practically eliminated if the operation point of each stage is adjusted so that it remains in the linear operation range HMILYYLIMH 2 of the transistor as temperature varies. 然而在设计得当的直流放大器中，若调节每一级的工作 点使之在温度变化时保持在晶体管线性区，就能在实际 上消除Ico以外的晶体管参数变化所造成的影响。 (2) Fill in the blanks with the most appropriate choice. 1. A message signal can any amplitude value between 0 and A volts. B. use C. receive D. accept 2. Each time a positive clock edge occurs, the flip-flop changes state, leading to half as many pulses at the output to the clock input. A. as C. due D. so as 3. In the previous section we discussed sine-w