วิชาภาษาอังกฤษ กขค ปี 2539
Part 4 : Questions
Direction : Read the following passages and choose the best answer for each question.
Before eating food sold by vendors on the
street , you should be aware that nearly all
of this food and water is
contaminated by toxic residues. If you choose to eat at home , you still have a 35 percent chance of eating rice which
has been contaminated by lead.
If egg dishes are your fancy , there is also a high probability that they have been contaminated by various
chemicals , regardless of whether they are eaten at home or on the street.
It seems that nothing is safe , for even fruits , instant foods , and beans may have been exposed to toxins at
some point in the production process.
In the 1994 - 1995 survey by the Food Analysis Division of the Department of Medical Sciences , it was revealed
that contaminated food is still very much a problem in the capital.
According to Supatra Im - urb of the Food Analysis Division , there are two ways food can become contaminated
: by chemicals or heavy metals , or by microbes.
Lead is the main type of heavy metal contamination. The survey indicated that nearly one hundred percent of
food samples taken from street vendors contain concentrations of lead. Drinking water is easily contaminated in this way.
The source of this pollution is , of course , traffic congestion. Every day automobiles release high levels of lead
into the air we breathe , which is why most food and drink sold by street vendors was shown to contain traces of the
According to the Division of Food Analysis , lead contamination has been found in food and drink at a number
of school canteens , which is particularly alarming when one considers that children are the ones being affected.
Lead contaminated is by no means the only danger. Food products , at every step of the production process ,
are exposed to several different forms of contamination.
It seems almost impossible food consumers to avoid contaminated food , as it affects vegetables , fruits , meats
and many other types of foods.
The survey showed that fruits and vegetables sold in markets contain pesticide residues such as phosphate ,
pyrethroid , and arsenic. Chemical substances such as pesticides and fertilizers are commonly used by farmers , who
seek to make their produce appealing in order to maximize profits.
People who eat meat take the risk of consuming drug residues. In many types of animal farming , hormones are
used to accelerate growth , so that 40 the livestock can be sold at market as quickly as possible.
But if the animals are killed before the drug is metabolized , people who eat the meat and entrails , particularly
the liver , will in effect be taking the same medicines. While these are not necessarily fatal , they can cause health
Contaminants like the ones mentioned above are absorbed by the body gradually , and increase over time. As
the levels of toxicity rise , sufferers become weaker and weaker , resulting in serious illness , even death.
รวบรวมโดย นงลักษณ์ เมธาวรากร
ตั้งแต่วันที่ 1 สิงหาคม พ.ศ. 2543
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