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方差分析中,组间变异主要反映的是
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随机区组设计与完全随机设计相比,以下哪项是错误的
Section ADirections: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the centre. You may not use any of the words in the bank more than once.Millions die early from air pollution each year. Air pollution costs the global economy more than $5 trillion annually in welfare costs, with the most serious 1 occurring in the developing world.The figures include a number of costs 2 with air pollution. Lost income alone amounts to $225 billion a year.The report includes both indoor and outdoor air pollution. Indoor pollution, which includes 3 like home heating and cooking, has remained 4 over the past several decades despite advances in the area. Levels of outdoor pollution have grown rapidly along with rapid growth in industry and transportation.Director of Institute for Health Metrics and Evaluation Chris Murray 5 it as an "urgent call to action." "One of the risk factors for premature deaths is the air we breathe, over which individuals have little 6 ," he said.The effects of air pollution are worst in the developing world, where in some places lost-labor income 7 nearly 1% of GDP. Around 9 in 10 people in low- and middle- income countries live in places where they 8 experience dangerous levels of outdoor air pollution.But the problem is not limited 9 to the developing world. Thousands die prematurely in the U.S. as a result of related illnesses. In many European countries, where diesel (柴油) 10 have become more common in recent years, that number reaches tens of thousands.A) ability E) control I) exclusively M) sourcesB) associated F) damage J) innovated N) undermineC) consciously G) described K) regularly O) vehiclesD) constant H) equals L) relates
油脂是一分子甘油和三分子高级脂肪酸通过酯键结合而成。
油脂在空气中放置长久而变质的过程称为酸败。
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