[中医中药]秦荻辉科技英语写作教程练习答案.doc

V、练习参考答案 练习1 II、 1、an（人们对这课题的兴趣越来越浓。) 2、a （功率额定值是电阻器不会引起温度太大的上升而能安全地耗散的最大功率。） 3、an（其主要的缺点是增加了噪声。） 4、The; a（该设备的成功设计需要详细地了解性能指标。） 5、the; a; a（在氢原子的布尔模型中，一个电子绕一个质子以半径为R的圆周运转。） 6、the（频率的单位是赫兹。） 7、a; a; an; the（如果在电路的两端加上电压的话，就会有电流在电路中流动。） 8、/; /（图5－1画出了Oersted的实验。） 9、an（这里我们应该使用一个18伏的电池。） 10、A; a; a（机器是能够传递力来完成某一确定目的的一种设备。） 11、The; /（水压机将在第14章加以考虑。） 12、The; the; the（研究处于运动中的流体，是力学中较为困难的分支之一，因为可能出现的现象是多种多样的。） 13、the; the [/]（我们容易确定参数μ的值。） 14、/; the（根据式（2－1），我们得到以下的关系式。） 15、an（在这里必须使用一根S形管子。） 16、the; /（作者工作在位于阿林顿的得克萨斯大学。） 17、an（这是一只R位的变换器。） 18、An（这里必须使用一个“异”或门电路。XOR = Exclusive OR） III、 This is an h parameter. We turn now to a discussion of local area networks. The Bainbridge mass spectrometer is as important an instrument as the optical spectrometer. It is necessary to find out how long a time is required for an electron to travel the [this] length of the wire. The density of a substance is its mass per unit volume. The radius of the earth is 6.37×106 m. The [These] two parameters are the same. An increase in pressure always causes a decrease in volume. Fig. (2-5) shows what is expressed by Eq. (2-2). The unit of inductance is the henry. Too large an input signal can cause nonlinear distortion. Using the definition of slope, we can derive the equation which represents a straight line. The expression f (x＋h)－f (x) is frequently used in the study of calculus. An equation which can be written in the following form is known as a linear equation in one unknown. In a computer, the tendency is to operate at as high a clock rate as possible. Tin does not have as high a melting point as lead (does). This average velocity is half the final velocity. Electricity can be easily changed into other forms of energy. In 1831, Joseph Henry in the United States discovered the phenomenon of electromagnetic induction. A computer consists of several parts [units]. IV、 Chemistry is based upon concepts that require the measurem