Question

Europe’s deadly outbreak of a rare form of E. coli bacteria (大肠杆菌) has brought new attention to food safety issues. One of the problems when people get sick from food is that the simplest question is often difficult or even impossible to answer. Just what did the people eat that made them sick?
Of course, one way to avoid these medical mysteries is to keep dangerous organisms out of the food supply. This is easier said than done, but scientists keep looking for new ways.
Scientists in the United States have developed an experimental system that uses a high-tech optical scanner. The system is designed to identify the presence of contaminants(致污物) like soil or animal waste on fresh produce. These can be sources of E. coli. E. coli bacteria naturally live in the intestines(肠) of humans and many animals. Most kinds of E. coli are harmless but some can make people sick.
The new scanner can also show damage and imperfections that might make the produce unappealing to shoppers.
Scientists designed the system at a Department of Agriculture research center in Beltsville, Maryland. Moon Kim of the Agricultural Research Service led the team.
MOON KIM: “We were requested, we were asked, to develop a method to detect contamination in produce. So we started with the apple as the model sample.”
The scanner uses a high-speed camera placed over the conveyer belt that moves the produce along. As the apples move along the belt, the scanner captures images of each piece of fruit.
Moon Kim says the team hopes the system will be available before long.
MOON KIM: “We are targeting for development in commercial plants for the next several years.”
The scanner can direct a sorting machine to separate the bad apples from the good ones. The system is currently able to show the surface of only half the apple as it speeds by. The inventers hope to improve the process so it can show the whole surface.
1.What is the main topic of the text?

A．Bacteria.?? B．A high-tech scanner.

C．A camera??? D．Food safety.

2.E. coli bacteria ______.

A．broke out all over the world????????????? B．comes from soil or animal waste

C．is extremely harmful to health????????????? D．does not cause illness

3.The high-tech scanner ______.

A．can help to sort out different fruits

B．make the produce appeal to shoppers

C．can only capture images of the whole apple

D．can identify the presence of contaminants

4.What can be inferred from the text?

A．The scanner needs to be improved.

B．The scanner will be available in the next several years.

C．Moon Kim is unwilling to develop the scanner.

D．The scanner is connected to a sorting machine.

 

Answer 1

【答案】

1.B

2.B

3.D

4.A

【解析】

试题分析：欧洲一种罕见大肠杆菌的致命爆发引发了人们对食品安全问题的新的关注。在人们因为食品致病的一系列问题中，有一个最简单的问题却常常难于甚至无法回答，这就是，他们吃了什么导致生病？美国科学家开发了一种使用高科技光学扫描装置的实验性系统。这种检测系统针对于食品包装上市环节。希望这个新科技能真的成为食品安全的福音。

1.主旨大意题。综观全文可知本文主要介绍了这种高科技的扫描仪，故选B。

2.细节理解题。根据contaminants(致污物) like soil or animal waste on fresh produce. 故选B。

3.细节理解题。根据The system is designed to identify the presence of contaminants(致污物) like soil or animal waste on fresh produce.该系统用于识别新鲜农产品表面上的土壤或动物粪便等污染物，故选D。

4.推理判断题。根据The system is currently able to show the surface of only half the apple as it speeds by. The inventers hope to improve the process so it can show the whole surface.这种扫描仪有待于提高，故选A。

考点：健康保健类短文阅读。