132．Woodsmoke contains dangerous toxins that cause changes in human cells. Because woodsmoke presents such a high health risk, legislation is needed to regulate the use of open-air fires and wood-burning stoves. Which of the following, if true, provides the most support for the argument above? (A) The amount of dangerous toxins contained in woodsmoke is much less than the amount contained in an equal volume of automobile exhaust. (B) Within the jurisdiction covered by the proposed legislation, most heating and cooking is done with oil or natural gas. (C) Smoke produced by coal-burning stoves is significantly more toxic than smoke from woodburning stoves. (D) No significant beneficial effect on air quality would result if open-air fires were banned within the jurisdiction covered by the proposed legislation. (E) In valleys where wood is used as the primary heating fuel, the concentration of smoke results in poor air quality. Key: E, mine: B. 算支持什么理由呢？AIR POLLUTION 支持了是HEALTH RISK？ 145．In Swartkans territory, archaeologists discovered charred bone fragments dating back 1 million years. Analysis of the fragments, which came from a variety of animals, showed that they had been heated to temperatures no higher than those produced in experimental campfires made from branches of white stinkwood, the most common tree around Swartkans. Which of the following, if true, would, together with the information above, provide the best basis for the claim that the charred bone fragments are evidence of the use of fire by early hominids? (A) The white stinkwood tree is used for building material by the present-day inhabitants of Swartkans. (B) Forest fires can heat wood to a range of temperatures that occur in campfires. (C) The bone fragments were fitted together by the archaeologists to form the complete skeletons of several animals. (D) Apart from the Swartkans discovery, there is reliable evidence that early hominids used fire as many as 500 thousand years ago. (E) The bone fragments were found in several distinct layers of limestone that contained primitive cutting tools known to have been used by early hominids. Key: E, mine: B. Cutting tools能推出use of fire吗? 我总觉得答案里应该有与fire 有关的信息吧。 | 
