指运动到筋疲力尽或主观最大运动强度的试验。一般用于正常人和运动员最大运动能力的研究（）
A.极量运动试验
B.低水平运动试验
C.症状限制性运动试验
D.定量行走试验
E.呼吸气分析
参考答案：A
解析：呼吸气分析包括测定通气量及呼出气中氧和二氧化碳的含量，并以此推算吸氧量、二氧化碳排出量等各项气体代谢的参数，分析方法可分为化学法和物理法两种。
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| Ebron James isn't the first high school basketball player to go straight into the NBA, but he's probably the 1 . He has the body, skills and the basketball brain of an All-Star (全明星球员). This talent was on_2_ as he scored 41 points to take Cleveland Cavaliers (克里夫兰骑士队) to a 107-104 win over the New Jersey Nets (新泽西网队) on March 28. Aged of 19 years and 87 days, James became the 3 player to score 40 or more in the NBA. "It was by far James' best 4 ," said Cleveland coach Paul Silas. Known to his friends as "the king", this was the day James earned his crown (王冠). But he was far from being a king during a childhood spent in the back streets of Akron, Ohio. Like many other African-American basketball players, James' early years were a 5 . His mother Gloria was just 16 when she gave birth to him; he knows nothing about his father. Mother and son battled for everything from food to a place to live. Without help from his grandmother and neighbors, James would 6 have died when he was young. This spirit of survival has served him well on court, forcing him to take any 7 he finds. "I 8 losing, I don't like losing," said James of his 41-point display. "I 9 the opportunity for us to win and I was 10 to capture it." At 2.03 metres, he is no Yao Ming but this didn't 11 him being first choice in 2003 NBA draft. This was 12 to his strength and skill, much of which he learned from high school American football. Although he has a 13 brain, James has never had to concentrate on 14 . Some people think this is a mistake and say he should have gone to college to 15 his mind. But James is one of the lucky few who has found fame and fortune without a diploma (文凭). On the court, he is king. | ||||
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