还有一个说，在某湖监测到了一个medical神马东东的存在，这种东东对人体有害，但是它的含量在一个很低的不会影响喝这些水的人的健康的数值。however，消除这个东东还是有必要的，因为消除这个东东对人的健康还是有好处的，问加强。LZ选了一个XX bacteria expose to 那个medical东东会变得对那个东东有抗体/抵抗力？= =LZ表达不能，大家自己体会。。。 感觉这是市gwd的原题呢。。记得看到过 -- by 会员 liber00000 (2010/10/26 22:58:25)
是PREP题，谢谢你
我去和狗主人确认
95.(28538-!-item-!-188;#058&002980)
Which of the following most logically completes the passage?
Using new detection techniques, researchers have found trace amounts of various medicinal substances in lakes and rivers.Taken in large quantities, these substances could have serious health effects, but they are present in quantities far too low to cause any physiological response in people who drink the water or bathe in it.Nevertheless, medical experts contend that eliminating these trace amounts from the water will have public health benefits, since __________.
A. some of the medicinal substances found in lakes and rivers are harmless to humans even if taken in large quantities
B. some of the medicinal substances found in lakes and rivers can counteract possible harmful effects of other such substances found there
C. people who develop undesirable side effects when being treated with medicines that contain these substances generally have their treatment changed
D. most medicinal substances that reach lakes or rivers rapidly break down into harmless substances
E. disease-causing bacteria exposed to low concentrations of certain medicinal substances can become resistant to them
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楼主
发表于 2010-10-26 23:09:20
呵呵，边申请边逛CD~