科技英语课后练习答案

Unit 1 练习答案及课文译文

Part 2 Reading A

I

1 F

2 T3F 4T5T 6.F 7.T 8.T 9.F 10.T

II

1. Reducing the time and cost of product development and production.

2. The product cycle is composed of two main processes：the design process and the manufacturing process．

3. The activities involved in the design process can be classified largely as two types：synthesis and analysis．

4. Rapid prototyping is becoming popular because this technology enables the construction of a prototype by deposition layers from the bottom to the top．

5. This includes the preparation of drawings，reports，and bills of materials.

III

1.d

2.e

3.b

4.j

5.i

6.c

7.f

8.h

9.g 10.a

IV

1.处理速度

2.用户友好的交互图形

3. 产品周期

4. 设计规格

5. 设计评价

6.CAD

7.CAM

8.CAE

9.design process 10.production process

Unit 3

Part 2 Reading A

Ⅰ Mark the following statements with T(true ) or F (false) according to the passage.

1.F

2.T

3.F

4.F

5.T

6.F

7.T

8.T

9.F 10.F

ⅡGive brief answers to the following questions.

1. Nissan will unveil a new city car ,the pixo and a battery-electric concept car

2. Pixo is available with manual or automatic transmissions.

3. Sales start from late spring 2009.

4. The NuVu battery pack uses new laminated lithium-ion cells with a capacity of 140 wh/kg .

5.There are no door mirrors to disturb the airflow.

Ⅲ Match the items listed in the following two columns.

1-5 j f d c g

6-10 e I h b a

Ⅳ Translate the following expressions.

1.手动或自动挡

2.内部设计

3.薄板锂离子电池

4.太阳能电池板

5.头尾灯

6 concept car

7. Horse power

8. test bed

9. battery pack

10. turning circle

ⅤTranslate the following sentences into Chinese.

1. 尼桑推出了一种新产品—城市汽车Pixo和一款电力驱动的概念车—NuVu，预示了尼桑未来的重点会放在电力驱动车上。

2. 尼桑表示，如果个人的流动性水平持续下降的话，正在进行的城市化将推进对城市中驾驶的各类汽车进行彻底的重新思考。

3. Nuvu最重要的方面是其内部设计，聪明的整体设计提供了极大的舒适和空间。

4. 两个踏板，用于停车和前进。还有数字仪表盘来显示速度，行驶距离和电池容量。

5.凭借其轻巧的结构，Pixo在NEDC(新欧洲循环驾驶)试验中产生的二氧化碳排放量低至103克/公里，燃料消耗量为4.6升/100公里。

Unit 2

Part 2 Reading A

I. 1. T 2. T 3. F 4. F 5.T 6. F 7. T 8. F 9. T 10. F

II.

1. Three. They are a Communication System, A Measurement system, A Feedback Control system.

2.It is to accept the input signal from an input device (microphone), use this signal to control the amplitude of a radio frequency signal (each broadcast station is assigned its own radio frequency), and drive the output device (the antenna) with a radio frequency current to produce electromagnetic waves radiating into space.

3. To acquire information from suitable transducers about the behavior of some physical system and to display this information to the observer.

4. Is the feedback control system

5. In which information about the behavior of the output modifies the signals driving the system.

III. b f g c e d j h i a

IV.

1.调幅

2. 射频

3. 冰点槽

4. 与…成比例

5. 数字显示器

6. audio microphone

7. receiving system

8. transmitting system

9. on-off control 10. set the temperature

V.

1. 接收器的功能是放大或增加天线接收的相对较弱的信号的强度，过滤或选择所需的其他广播站的射频信号，用射频信号振幅的改变来恢复音频信号，并用此音频信号驱动扬声器。

2. 在测量系统中，每一个处理步骤都会将预计到的涉及查找和消除的任何小错误，添加到的信号上。

3. 第三个系统是反馈控制系统，在该系统中，通过输出性能的数据来调整驱动系统的信号。

4. 这种恒温调节器包含确定室内温度的输入设备（通常，双金属带随温度改变而弯曲），设置所需温度的机械装置（设置温度的拨号盘），以及机械式开关，由双金属带启动，控制熔炉。

5. 假设熔炉没有开关装置，房间的温度，或者升到最高某个温度（如果熔炉一直开着），或者降到最低的某个温度（如熔炉一直关着）。

Unit 4 练习答案

Part 2 Reading A

Ⅰ Mark the following statements with T(true ) or F (false) according to the passage

1.T

2.F

3. T

4. F

5.T

6.T.

7.F.

8. T

9.T 10.F

ⅡGive brief answers to the following questions