Nuclear rockets, in contrast to their chemical

The ancient Egyptians are supposed ______ rockets to the moon.

Rockets have found application for the exploration of the universe.

如何控制住火箭的动力，是成功发射宇宙飞船的一个关键。 A: How to harness the power of the rockets, which is the key to the successful launch of a spaceship. B: How to harness the power of the rockets, it is the key in the successful launch of a spaceship. C: How to harness the power of the rockets is the key to the successful launch of a spaceship. D: How to harness the power of the rockets is the key in the successful launch of a spaceship.

Rockets perform best in space, where there is no atmosphere to impede their motion.

This passage could be entitled ______. A: Rockets B: Principles of Rocket C: Cylinder D: The Rocket Belt

Within two days， the army fired more than two hundred rockets and missiles at military ________ in the coastal city.

Nuclear rockets, in contrast to their chemical 17）________, could impart a maximum speed of up to about 22 kilometers a second.

原文:Rockets have found wide application for the exploration of the universe. 译文:火箭已经广泛用于探索宇宙。

Which was/were not the component of Wan Hu’s spaceship? A: two wings made of wood B: a chair C: 47 powerful gunpowder rockets D: two kites