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空气中氧的体积分数为21％，试求总压为101．325kPa，温度为10T：时，每立方米水中最大可能溶解多少克氧?已知10℃时氧在水中的溶解度表达式为p=3．313×105x，式中p为氧在气相中的平衡分压，单位为kPa；x为溶液中氧的摩尔分数。

A.325kPa，温度为10T：时，每立方米水中最大可能溶解多少克氧?已知10℃时氧在水中的溶解度表达式为p*=3．313×105x，式中p*为氧在气相中的平衡分压，单位为kPa；x为溶液中氧的摩尔分数。

【参考答案】

11．4g
4g

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听力原文： At sixteen, Henry Vincent was separated from his family as a result of the war. He wandered aimlessly from one country to another before finally settling down in Australia，where he trained as an electronics engineer, He established his own business but it called for so much work that marriage was out of the question. His retirement suddenly made him realize how lonely he was and he decided to take up a hobby. With his interest in electronics, being an amateur radio operator seemed a natural choice. He installed his own equipment and obtained a license and his call sign, which is the set of letters and numbers used to identify oneself when making radio contact with other amateur operators all over the world. Soon Henry had a great many contacts in far off places. One in particular was a man in California with whom he had much in common. One night the man in California happened to mention the village in Europe he had come from. Suddenly, Henry realized that this man was in fact his younger brother, Peter. At first, the two brothers were at a loss for words but then little by little they filled in the details of their past lives and not long afterwards Henry Vincent flew to California to be reunited with his brother.(33)A．He was trained as an electronics engineer.B．He was trained as a mechanical engineer.C．He was trained as a communication engineer.D．He was trained as a nuclear engineer.

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