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44、患者，男性，57岁，与家人发生争执，服药物中毒，急诊入院抢救。试验发现当酸化尿液时，药物肾清除率小于肾小球滤过率，碱化尿液时则相反，推测该药物可能是
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Proofreading & Error CorrectionEach indicated line contains a maximum of one error. In each case, only one word is involved. You should proofread the passage and correct it in the following way:For a wrong word, underline the wrong word and write the correct one in the blank provided at the end of the line.For the missing word, mark the position of the missing word a “^” sign and write the word you believe to be missing in the blank provided at the end of the line.For an unnecessary word, cross the unnecessary word with a slash “/” and put the word in the blank provided at the end of the line.Humankind’s future safety and longevity of life on Earth largely dependon the environment which we live. Keeping the air we1breathe free of pollution is a major priority towards making this eartha safe place. Other areas of concern are water, land, the ozone layer,and the preservation of flora and fauna of the planet.Every country has ecological issues to deal. In South America, 2the rain forests are rapidly disappearing as people burn and cut downtrees to make for farmland. Many Middle-Eastern and Asian countries3have a battle to fight with air, water, and land pollution.Lakes and swamps are spread with debris.4Mass chemical spraying is used to kill pests on trees and plants. Abundant5use of water in countries as China has caused major water shortage.6Rivers become polluted by factories and the populations that liveon their banks. Global warming isconsidered a major factor caused the droughts 7in eastern China, the Sudan, Ethiopia, and northern Kenya. The reduction of the ozonelayer is blamed for the global warming trends in variant countries of this globe, 8and the spread of disease like skin cancer. Societies at large need to pay attentionto the existing problems in order to get of the imminent danger of famine, 9drought and diseases that rise from the damage that pollution causes. 10
甲类、乙类、甲乙类功率放大电路能量转换效率最高的是甲类。
乙类功率放大电路在理想情况下最大效率可达100%。
乙类互补对称功率放大电路会产生交越失真。
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