写作：
       随着年龄的增长，阅历的丰富，情志的提升，曾以为遥不可及的事物，如快乐，如幸福，如成功等，都进驻过心田，化成真切的体验，铭心的感受，前进的动力。
       请以“原来，__________并不遥远”为题，写一篇文章。
       要求：①在空缺处填上合适的词或短语；②文体自选（诗歌除外）；③文中不得出现真实的人名、校名、地名；④不少于600字。

某发电厂输出的功率为200kW，输出电压为10kV．若采用200kV的高压输电，那么，升压变压器（不计变压器能量损失）的原线圈和副线圈的匝数比为____；输电线等效电阻为10Ω，输电线上的电压损失为____ V．

    Each zebra has its own unique pattern of distinctive stripes (带), just ____humans have their own unique pattern of fingerprints, Zebras stick together in herds (兽群). Within a herd, zebras tend ____ (stay) together in smaller family groups. Families are generally made up of a male, several females____their young.

    As zebras graze, they use their sharper front teeth to bite the grass, and then use their duller back teeth to crush and grind. A zebra's teeth keep growing for____ (it) entire life, because constant chewing____(wear) them down.

    Zebras are____ (constant) on the move to find fresh grass and water. Sometimes they gather in huge herds of thousands as they migrate to better feeding____ (area). They often travel in____ (mix) herds with other grazers and browsers, such as wildebeest.

    Zebras groom (理毛) one another, If you see two zebras standing close____ each other and it looks like they're biting each other, don't worry. They're pulling loose hairs off each other as they groom. Grooming also feels good to a zebra—it's like having an itch scratched,

    While most zebras are least endangered, Grevy's Zebra____ (classify) as endangered.

标志着我国初步建立起社会主义基本制度的事件是（    ）