葡萄中有含量丰富的白藜芦醇（化学式为C₁₄H₁₂O₃），它能抗癌细胞的增生．试计算：

（1）白藜芦醇的相对分子质量．

（2）白藜芦醇中碳、氢、氧元素的质量比．

（3）白藜芦醇中碳元素的质量分数（精确到0.1%）．

Ranch. It was near Los Angeles in CaliforniA. A few years later Hollywood was one of the famous places in the world. At the beginning of the 20th century there was a big farm called Hollywood. From the 1910’s to the 1950’s, Hollywood was the film center of the world.

Every family knew the names of its film stars—Charlie Chaplin, Greta Garbo, Bergman and hundreds more.

The reason why people went to Hollywood to make films was the sun. At first, people made films in New York on the east coast of the United States.

But then they heard about Los Angeles, where there are 350 days of the sun every year. As they made all the films by sunlight, the west coast was a much better place to work. Also near Hollywood you can find mountains and sea and desert. They did not have to travel far to make any kind of film.

When TV became popular, Hollywood started making films for television. Then in the 1970’s they discovered people still went to the cinema to see big expensive films. Nowadays they are still making films in Hollywood and people see them all over the world.

Hollywood used to be a ().

A．cinema

B．big farm

C．park

D．market