The rockets take astronauts and man-made satellites (卫星) into space. The satellites are used for communication, weather checking and research.But how do satellites stay up without falling down? There are two different forces(力量) influencing the satellites. One of them is the force of gravitation(地心引力), which tries to pull the satellites towards the earth and is like a rope which keeps the satellites from flying away. The other force is created by the turning of the satellite around the earth. This force tries to take the satellite away from the earth. With these two forces, the satellite goes round and round.

Everything that goes up has to come down. It is only a matter of time before a satellite comes back to the earth. As time goes by, the satellite loses its speed, which makes the force pull it towards the earth stronger than the force pulling it away. This makes the satellite fall down to the earth.

根据短文内容。判断下列句子的正（A）误（B）
【小题1】The satellites can’t be used for doing research.
【小题2】There are two same forces that caninfluence the turning of the satellites.
【小题3】The force created by the turning ofthe satellite helps to take the satellite away from the earth.
【小题4】The satellite will lose its speed as time goes by.
【小题5】It’s possible for the satellite to stay in space forever.