A
From service robots in virtual stands to 5G applications displayed in cloud booths (展 台), several innovations stood out at the 2020 China International Fair for Trade in Services （CIFTIS）, which was held from Sept 4 to 9 in Beijing. Themed "Global Services, Shared Prosperity", the event has presented many cutting-edge technologies. Let's take a look.
Al-powered garbage-sorting robot
It can detect and sort the garbage on the conveyor belt and then throw it into different dustbins. For example, it will put plastic bottles and containers into recyclable dustbins. With advanced technologies such as cloud computing and robot automation, the robot can sort through garbage with an accuracy of 98 percent, which will significantly reduce operating costs and improve efficiency.
Bionic (仿生的)machine shark
A dark gray, life-size "shark", was also displayed at CIFTIS. This bionic shark can move forward by imitating the swinging motion of fish tails. It has a maximum speed of six knots （about 11 kilometers per hour）, which is much faster than the average speed of about two knots of other bionic submersible (潜水的)vehicles. It is equipped with lighting, a camera system and imaging sonar (声呐),which can be used for underwater searches, seafloor mapping and underwater shooting.
Driver fatigue (疲劳)warning system
A warning system to prevent people from falling asleep while driving was introduced at the fair. It can judge whether the driver is sleepy by monitoring how long the driver's eyes close or if his or her head drops. If the driver enters a state of fatigue, the system will immediately sound an alarm until the driver's eyes reopen and he or she starts to blink at a normal frequency. In the future, other dangerous driving behaviors, such as not wearing a seat belt and making phone calls while driving, might also be added into this warning system.
21. What can we know about the 2020 CIFTIS?
A. It was held online.
B. It lasted for more than a week.
C. It highlighted advanced technologies.
D. It used service robots to assist people.
22. What is the main feature of the Al-powered garbage-sorting robot?
A. High accuracy.
B. Easy operation.
C. Safe recycling process.
D. Extremely low operating costs.
23. How does the warning system identify fatigued drivers?
A. By using a bionic machine.
B. By examining the driver with imaging sonar.
C. By monitoring the driver's brain activity.
D. By analyzing the driver's body movements.
【答案】21. C 22. A 23. D
【解析】
【分析】
这是一篇说明文。文章介绍了在北京举行的2020年中国国际服务贸易展览会（CIFTIS）上，从虚拟展台上的服务机器人到云端展台上展示的，几项创新脱颖而出的5G应用程序，活动以“全球服务，共享繁荣”为主题，展示了许多尖端技术。
【21题详解】
推理判断题。根据第一段第二句“Themed "Global Services, Shared Prosperity", the event has presented many cutting-edge technologies.”（ 这次活动以“全球服务，共享繁荣”为主题，展示了许多尖端技术。）可知，这次展览会展示了先进的技术，选项C符合题意。根据第一段第一句还可以判断，这次展览会，并非“在线举行”，持续时间“不到一周”，只是展览的技术中有“服务机器人”，可以排除ABD项。故选C项。
【22题详解】
细节理解题。根据小标题“Al-powered garbage-sorting robot”（人工智能垃圾分类机器人）段落最后一句“With advanced technologies such as cloud computing and robot automation, the robot can sort through garbage with an accuracy of 98 percent, which will significantly reduce operating costs and improve efficiency.”（ 通过云计算和机器人自动化等先进技术，机器人能够以98% 的准确率对垃圾进行分类，这将显著降低运营成本，提高效率。）可知，人工智能垃圾分类机器人有高精度的特征。故选A项。
【23题详解】
细节理解题。根据文章最后一段第二句“It can judge whether the driver is sleepy by monitoring how long the driver's eyes close or if his or her head drops.”（ 可以通过监测司机的眼睛闭合多长时间或者头是否下垂来判断司机是否昏昏欲睡。）可知，警报系统识别疲劳驾驶的司机是通过分析司机的身体动作。故选D项。
【点睛】阅读理解题之细节理解解题要注意：1.排除干扰项，突出主题。2.按文章的体裁，作者写作的组织模式及有关信息，预测应该到何处寻找自己所需要的事实。3.将注意力放在寻找你所需要的细节上，快速浏览，一目十行。发现细节，十目一行，放慢速度，仔细核对比较，直到找到正确答案。
