中国古代南北方人口总数及所占比例对照表，据表可知（    ）

    Cindy, Jerry and Mary are giving their ideas about what a good friend should be like.

    Cindy: I think a good friend should be honest(诚实).That's the most important thing and is where a real friendship(友谊) starts. If a friend isn't honest, he may lost his friends' trust.

    Jerry: I think a good friend should be generous. Here “generous” doesn't mean he has to give his friends his money or his clothes. It means he should share his ideas and feelings with his friends. So, his friends can know him better in this way.

    Mary: For me, a good friend should understand his friends. When there's something bad between him and his friends, he must put himself in his friends' place and think more for his friends.

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2016年唐山至承德的铁路正式开通，使京津冀地区的铁路网进一步完善。