它被称为种姓的国度，产生了最早的世界性宗教和1—10的计数方法，这个文明古国是（     ）

    It is a hot day in summer. A lion is walking along a lake. He is looking for something to eat. He is very hungry. A duck is swimming in the river. The lion is very excited to see him. ‘Aha, there is my lunch,' the lion says to himself.

    "Hello, Mr Duck!" "Go away, bad lion!" says the duck. "I have good news for you." "What is it?" asks the duck. "I don't want other animals to hear it. Please come here." says the lion. The duck swims out of the river and runs to the lion. The lion eats him up quickly.

1970年，我国用____运载火箭，成功地发射了第一颗人造地球卫星——____。