【简答题】短文填词 How far is the sun from the earth? This is really a question ________(引起兴趣) scientists of all times. But they had no way of getting an exact answer.Now with the use of radio telescope, they are ...
【简答题】n England, people often talk about the weather because they can experience ( 经历 ) four seasons in one day. In the morning the weather is warm just like in spring. An hour later black clouds come and t...