在▱ABCD中，若∠A=120°，则∠D=____°．

把下面分数化成百分数，并记住结果

$\frac{1}{3}$ ≈____％

$\frac{3}{4}$ ＝____％

$\frac{4}{5}$ ＝____％

如图，△ABC中，D是BC上一点，AC=AD=DB，∠BAC=102°，则∠ADC=____度．

信息归纳：阅读下文，根据所提供的信息, 完成下列表格。
    I am Jay from Yangjiang Sunshine Middle School. Recently, we carried out a survey on whom we prefer to share worries with. We got different answers.
    According to the survey, about 71% of the students would like to share their worries with their classmates and friends. It is mainly because they believe that if people are at the same age, they are easy to communicate and understand each other better.
    About 22% of the students said they would like to share worries with their teachers and parents. They think adults are rich in experience, and that they can solve their problems easily. The rest(其余的) prefer to keep worries to themselves. As for them, it's a struggle to get along well with others, some of them said they didn't want to trust anyone.
    In my opinion, I will share worries with my best friends because they're always kind and understanding. However, if I meet with some serious problems, I'll be likely to ask my parents and teachers for help, who, I believe, have more experience to give me valuable advice.

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与现今大气的成分相比，原始大气中没有(     )