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wood smoke contains dangerous toxins that cause changes in human cells.Because wood smoke presents such a high health risk,legislation is needed to regulate the use of open-air fires and burning stoves. which of the following,if true,provides the most support for the argument above?
B within the jurisdiction covered by the proposed legislation,most heating and cooking is done with oil or natural gas.
E in valleys where wood is used as the primary heating fuel,the concentration of smoke results in poor air quality.
本人选B,认为,只有大家并不是非要用木头生火做饭取暖的时候,这个法令才得以执行。 正确答案E。 |
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