【正确答案】 C

【答案解析】[听力原文]
   When a sleepy driver has trouble in keeping his eyes on the road and gets too close to another car, an alarm will sound to warn the driver. If nothing is done, the car will automatically come to a stop and in this way prevent an accident. This is a new device which will soon be tested in an experimental car in Japan. The computer warning system keeps track of a driver's condition by monitoring his heartbeat with signals transmitted from a band around his wrist. The wrist band records the driver's pulse which measures the heartbeat. Each pulse in the wrist sends a signal to the computer. By analyzing the pulse rate, the computer can determine whether a driver is drunk, sleeping or ill. Devices in other parts of the car can also tell the computer if the car is too close to another vehicle or is moving dangerously. The computer will sound the alarm when a problem arises, and will automatically stop the car if the driver ignores the warning.
   Q: Why is a computer system installed in an experimental car?
当一个昏昏欲睡的驾驶员无法全神贯注地注意路况并且使两辆车之间车距过近时，就会有警报声响起，向驾驶员发出警告。如果驾驶员还是没有采取任何措施，车辆就会自动停下来，以此避免事故的发生。这是一种新型装置，很快就会在日本的实验车辆上进行测试。这种电脑警报系统能够通过驾驶员手腕上佩戴的腕带所发射的信号对驾驶员的心跳进行监测，从而对他的状况进行跟踪记录。这种腕带能够记录驾驶员的脉搏，以此来测量他的心跳。腕部的每一下脉搏跳动都会对电脑发射信号。通过对脉搏率进行分析，电脑系统可以据此判断驾驶员是否酒驾、疲劳驾驶或是身体不适。车辆其他部分的装置也能够告诉电脑这辆车是否与另外一辆车之间距离过近或是危险行驶。出现问题时，电脑系统就会响起警报，如果驾驶员无视警报的话，电脑就会使汽车自动停下来。
   快速浏览各题选项，根据drive、car、driver、accidents、driving、measure、monitor、analysis、pulse、brain、blood、heartbeat等关键词推测，短文可能与驾驶以及对驾驶员生命体征的分析有关，可能介绍某种先进科技。
   ①四项均为以to开头的不定式短语，表目的。
   ②四项均含有与开车有关的词汇(drive, car, driver's, car accidents)。
   ③两项含有与驾驶员的生命体征有关的词汇(pulse, health)。
   结论：本题可能考查某种先进科技对驾驶员的帮助，可能涉及对驾驶员生命体征的检测。
   题干问为什么要在实验车辆上装这种电脑系统。短文开头介绍道：当驾驶员十分困倦，眼睛无法盯着路面从而离其他车辆过近的时候，警报就会响起以提醒驾驶员。如果驾驶员还是没有采取任何措施，车辆就会自动停下来，以避免事故的发生。这从侧面反映了这种系统的作用，那就是预防事故、保护驾驶员的安全，故选C。