The first watermill was horizontal and resembled a {{U}}rudimentary{{/U}} turbine.
A:a flat B:a rusty C:an unconventional D:an unsophisticated
The main characters of Horatio Alger's books always rise from poverty to {{U}}riches{{/U}}
A:maturity B:wisdom C:status D:wealth
The gar is a fish with a long, {{U}}slender{{/U}} body and scales as hard as flint.
A:flat B:straight C:slim D:fragile
Scientists {{U}}routinely{{/U}} deal with concepts such as uncertainty, probability, and hypothesis.
A:reluctantly B:carefully C:commonly D:occasionally
The earliest kind of desk was a box that had a {{U}}sloping{{/U}} lid, under which there was storage space for writing materials.
A:a sturdy B:a polished C:an inclined D:an adaptable
Generally, a material with a {{U}}sour{{/U}} taste, such as vinegar or lemon juice, contains an acid.
A:a tart B:an oily C:a fruity D:a bland
Extending from Quebec to Alabama, the Appalachian Mountain region is extensive and very {{U}}scenic{{/U}}.
A:vast B:rustic C:fertile D:picturesque
{{U}}Rival{{/U}} traditions of acting have coexisted in Western theater since antiquity.
A:Myriad B:Rudimentary C:Stylistic D:Conflicting
Hoof-and-mouth disease was eliminated in the United States by {{U}}slaughtering{{/U}} affected herds of cattle.
A:isolating B:testing C:vaccinating D:killing
阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。
{{B}}? ? ? ? ? ? ?
? ? ? ? ? ? ? Food and Health{{/B}}
?
?The food we eat seems to have profound effects on our health. Although
science has made enormous steps in making food more fit to eat, it has at the
same time, made many foods unfit to eat. Some research has shown that perhaps
eighty percent of all human illnesses are related to the diet as well,
especially cancer of the colon (结肠). Different cultures are more likely to
develop certain illnesses because of the food that is characteristic in these
cultures. That food is related to illness is not a new discovery. In 1945,
government researchers realized that nitrates (硝酸盐)commonly used to preserve
color in meats, and other food additives, accused cancer. Yet, these additives
remain in our food, and it becomes more difficult all the time to know which
things on the packaging labels of processed food are helpful or harmful. The
additives which we eat are not all so direct. Farmers often give penicillin(青霉素)
to beef and poultry(家禽),and because of this, penicillin has been found in the
milk of treated cows. Sometimes similar drags are administered to animals not
for medicinal purposes, hut for financial reasons. The farmers are simply trying
to fatten the animals in order to obtain a higher price on the market. Although
the Food and Drug Administration(FDA) has tried repeatedly to control these
procedures, the practices continue. |
As a result of scientific intervention (介入) ,some harmful substances have been added to our food.
A: B: C:
单选题
