如图，等腰Rt△OAB和等腰Rt△OCD中，∠OAB=∠OCD=90°，AO=AB，CO=CD，等腰Rt△OAB与等腰Rt△OCD是位似图形，O为位似中心，相似比为1：2，若点B的坐标为（1，0），则点C的坐标为（　　）

    Does the age gap matter in a relationship?

    The love story of French President Emmanuel Macron and Brigitte Trogneux, 24 years his senior, has aroused heated discussion on age differences ____ relationships. Does age matter or should love prevail(战胜) over all?

    I find ____ a very heartwarming love story. Not just this couple,____any couple - what does age difference matter after all? If they love each other,____ ( devote) to the relationship and work on making it strong, that is what____ (count).

    It is nearly impossible for Chinese women to accept Macron's relationship. It is  ____ (common) for older men to marry younger women, but for an older woman to marry a younger man is often seen as ____ (appropriate). If you get along well, go for it, it's your life and life is way too short____ (let) a potential soul mate get away because of what you think others would say. I think it really doesn't matter. It is involved in the ____ (devote) of the people and how well they enjoy each other's company is important along with supporting each other ____(emotion), financially etc....

天高任鸟飞．除了鸵鸟、企鹅等少数鸟类不能飞行以外，绝大多数鸟都是善于飞行的．请根据鸟类相关知识填空．从骨骼来看，骨轻薄且____，长骨____；从骨骼来看，____发达，能迁移两翼变成飞行动作；从消化看，食量大，消化能力强，提供足够的____以供飞行用；从呼吸看，家燕体内具有与肺相通的____，每呼吸一次，肺内进行两次气体交换，大大提高气体交换效率。