As to two stroke diesel engine, in the part of the cylinder liner inside the scavenging air box there is a series of openings known as _______.

单选题

As to two stroke diesel engine, in the part of the cylinder liner inside the scavenging air box there is a series of openings known as _______.

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单选题

If all other conditions such as bore, stroke, speed, and mean effective pressures are equal, a two stroke/cycle diesel engine will develop approximately ______.

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材料题

o longer the major cause of death in most countries.Health officials say as many as eighty percent of deaths from chronic diseases could be prevented.They say an important tool for governments is to restrict the marketing of alcohol and tobacco to young people.Also,more programs are needed to urge healthy eating and more physical activity.UN officials aim through international action to reduce chronic-disease deaths by two percent each year through 2015.They say meeting that target could save t

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材料题

n America has a stroke.Every 3. 1 minutes,someonedies of one.Stroke killed an estimated 167,661 people in 2000 and is the nations thirdleading cause of death,ranking behind diseases of the heart and all forms of cancer. Stroke is a leading cause of serious,long-term disability in the United States.2 Stroke is a type of cardiovascular（心血管的）disease. It affects the arteries（动脉）leading to and within the brain.A stroke occurs when a blood vessel that carries oxygenand nutrients（营养物）to the brain is ei

答案解析

材料题

n America has a stroke.Every 3. 1 minutes,someonedies of one.Stroke killed an estimated 167,661 people in 2000 and is the nations thirdleading cause of death,ranking behind diseases of the heart and all forms of cancer. Stroke is a leading cause of serious,long-term disability in the United States.2 Stroke is a type of cardiovascular（心血管的）disease. It affects the arteries（动脉）leading to and within the brain.A stroke occurs when a blood vessel that carries oxygenand nutrients（营养物）to the brain is ei

答案解析