When permits for the discharge of chemicals into a waterway are issued, they are issued in terms of the number of pounds of each chemical that can be discharged into the waterway per day. These figures, calculated separately for each chemical for which a permit is issued, are based on an estimate of the effect of the dilution of the chemical by the amount of water flowing through the waterway. The waterway is therefore protected against being adversely affected by chemicals discharged under the permits. The argument depends on the assumption that
A. relatively harmless chemicals do not interact with each other in the water to form harmful compounds.
B. there is a swift flow of water in the waterway that ensures rapid dispersion of chemicals discharged.
C. there are no chemicals for which discharge into waterways is entirely prohibited.
D. those who receive the permits do not always discharge the entire quantity of chemicals that the permits allow.
E. the danger of chemical pollution of waterways is to be evaluated in terms of human health only and not in terms of the health of both human beings and wildlife.
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(91～93题共用题干)男性，60岁，肺气肿史，发热咳嗽一周，痰量多而黏稠，胸片右上肺大片状阴影内有多个空腔，水平裂呈向下弧形 选哪项治疗方案
A. 2HRSZ/4HR
B. 顺铂+长春碱酰胺
C. 2HRE/4HR
D. 2[HRE/2HE
(91～93题共用题干)男性，60岁，肺气肿史，发热咳嗽一周，痰量多而黏稠，胸片右上肺大片状阴影内有多个空腔，水平裂呈向下弧形 该病人应选用的抗生素是
A. 氟康唑
B. 链霉素
C. 甲硝唑
D. 万古霉素
Although many brands of gasoline are sold on Haibei island, gasoline companies there get all of the refined gasoline they sell from Haibei seaport’s only storage tank, which is always refilled with the same quality of gasoline. Therefore, the brands of gasoline for sale on Haibei may be different in name and price, bat they are identical in quality. The conclusion drawn above depends on which of the following assumptions
A. Consumers are usually unaware of variations in the quality of the gasoline they buy unless those variations are announced by the gasoline companies.
B. When tankers make gasoline delivery at Haibei’s seaport, the storage tank an Hailed always receives the same quantity of gasoline as that in the preceding delivery.
C. There is a wide variation in the price at which the different brands of gasoline on Haibei are sold.
D. If any gasoline company on Haibei alters the quality of its gasoline before sale, the other gasoline companies also use methods before sale that result in the same change in the quality of their gasoline.
E. The gasoline storage tank on Haibei’s large enough to meet the needs of all of Haibei’s different gasoline companies.
Within 20 years it will probably be possible to identify the genetic susceptibility an individual may have toward any particular disease. Eventually, effective strategies will be discovered to counteract each such susceptibility. Once these effective strategies are found, therefore, .the people who follow them will never get sick. The argument above is based on which of the following assumptions
A. For every disease there is only one strategy that can prevent its occurrence.
B. In the future, genetics will be the only medical specialty of any importance.
C. All human sicknesses are in part the result of individuals’ genetic susceptibilities.
D. All humans are genetically susceptible to some diseases.
E. People will follow medical advice when they are convinced that it is effective.
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