— So you’re the first woman they hired.

— Yes. 　  51 　

— And how are you doing?

— 　  52 　

— How do you do it? Do you do anything special?

— 　  53 　 There are a lot of women looking at cars and buying cars by themselves. A lot of them feel more comfortable talking to a woman. And you know, I like to talk.

— 　  54　 

— Most of men are friendly. But there are two or three who don’t talk to me. And at lunch, when they go out together, they never ask me.

— It’s going to take time.

—Yeah, _________

我国某些地区居民喜欢食用的腌制食品能产生致癌物二甲基亚硝胺C₂H₆N₂O．二甲基亚硝胺的相对分子质量是______，二甲基亚硝胺中碳、氢、氮、氧的质量比是______，氧元素的质量分数是______．（计算结果保留一位小数）