单选题 During first ten years of the Space Age, which began in 1957, more than500 artificial satellites were rocketed into orbit around the Earth.

【正确答案】 A

【答案解析】答案：A first>> the first 分析：考的是定贯词的使用；first 要与限定词连用，比如，the first, his first。翻译：在始于1957年的太空时代的头10年内，有超过500颗的人造卫星被送上环绕地球的轨道。