学生每周使用计算机时间增加的原因英语作文

练习1

I、在下列每个句子的空白处填上适当的冠词，然后将句子译成汉语：

1. There has been __an___ ever greater interest in this subject.

2. The power rating is the maximum power the resistor can safely dissipate without too great __a_ rise in temperature.

3. Its primary disadvantage is __an___ increase in noise.

4. __The___ successful design of the equipment requires ___a__ detailed knowledge of the performance specifications.

5. In __the___ Bohr model of the hydrogen atom, ___a__ single electron revolves around ___a__ single proton in a circle of radius R.

6. The unit of frequency is ___the__ hertz.

7. If __a___ voltage is applied across ___a__ circuit, ___an__ electric current will flow in __the___ circuit.

8. ____ Fig. 5-1 shows _____ Oersted’s experiment.

9. We should use ___an__ 18-volt battery here.

10. ___A__ machine is __a___ device for transmitting force to accomplish ___a__ definite purpose.

11. ___The__ hydraulic press will be considered in _____ Chapter 14.

12. ___The__ study of fluids in motion is one of _ the____ more difficult branches of mechanics because of __the___ diversity of phenomena that may occur.

13. It is easy to determine __the___ value of __the___ parameter μ.

14. By _____ Eq. (2-1) we have _the____ following relation.

15. It is necessay to use __an___ S-shaped tube here.

16. The authors work at __the___ University of Texas at _____ Arlinton.

17. This is __an___ R-bit transformer.

18. ___An__ XOR gate must be used here.

II、将下列句子译成英语，注意正确地使用冠词：

1、这是一个h参数。

This is an h parameter.

2、现在我们转向讨论一下局域网。

Now let’s turn to a discussion of local area networks.

3、Bainbridge 质谱仪是与光谱仪一样重要的仪器。

4、必需求出为使一个电子通过这一段导线需要多长的时间。

It is necessary to find out how long a time it needs to ravel the length of the wire for an electron.

5、物质的密度是其每单位体积的质量。

6、地球的半径为×106米。

106 m.

7、这两个参数是相同的。

8、压力的增加总会引起体积的减少。

9、图画出了式所表示的情况。 10、电感的单位是亨利。

11、输入信号太大会引起非线性失真。

12、利用斜率的定义，我们能导出表示直线的方程。

13、f (x＋h)－f(x)这一表达式经常用在学习微积分中。