Chicago is becoming one of the country's most wonderful cities to film television. When this wonderful place is properly represented in a film, I cannot help but love it! Here are some movies that feature this great city.

    Southside With You

    Neighborhood: The whole South Side

    Director: Richard Tanne

    Starring: Tika Sumpter and Parker Sawyers

    Rotten Tomatoes Score: 92%

    Released: 2016

    Genre（类型）: Biography, Drama, History and Romance

    High Fidelity

    Neighborhood: Wicker Park

    Director: Stephen Frears

    Starring: John Cusack, Jack Black and Todd Louiso

    Rotten Tomatoes Score: 91%

    Released: 2000

    Genre（类型）: Comedy, Drama, Music and Romance

    Mean Girls

    Neighborhood: This one is famous since it takes place in Evanston and some other parts of the North Shore.

    Director: Mark Waters

    Starring: Lindsay Lohan, Rachel McAdams and Amanda Seyfried

    Rotten Tomatoes Score: 83%

    Released: 2004

    Genre: Comedy

    Hoop Dreams

    Neighborhood: Cabrini-Green, West Garfield Park and Westchester, IL

    Director: Steve James

    Starring: William Gates and Arthur Agee

    Rotten Tomatoes Score: 98%

    Released: 1994

    Genre: Documentary, Drama and Sports

下表中各元素的数据代表该元素占原子总量的百分比．请据表回答问题．

（1）组成人体的化学元素在元素周期表上都有，它普遍存在于非生物界，生物体内不包含特殊的“生命元素”，这个事实说明____ 

（2）生物从非生物环境中获得的元素与环境中的元素的比例相差甚远．如岩石圈中氢、碳、氮加在一起占总原子数不到1%，而在生物体中则占74%左右．这个事实说明____ ．

（3）从此表看，人体成分中没有铁的含量，是否人体不含铁？____．为什么？____．

（4）人体内的镁可以从蔬菜中的什么器官获得？____．为什么？____ ．

（5）在上述元素中，人体核酸是由____ 元素组成．