閱讀短文，按要求回答問題。
    "Hello，everyone!Welcome to Tiangong Class，" With this greeting，a special lecture began on Tiangong space station on Dec 9，2021.It's about 400 kilometers above Earth.The space lecture lasted for about an hour and it was broadcast live to millions of students.Three astronauts from Shenzhou XⅢ crew—Zhai Zhigang，Wang Yaping and Ye Guangfiu hosted the lecture.They showed how they live and work on the space station and did some interesting experiments.The experiments are interesting because they could only be done in space.It was the second live space lecture that Wang Yaping on the space station.
    Compared with the class nine years ago，the space lecture in 2021 was greatly different.Firstly，the "classroom" was bigger.Wang Yaping delivered the space lecture in Tianhe space core module（核心艙），which is the biggest spacecraft developed by China till now.Secondly，the quality of space-to-ground interaction and communication was also much improved.Thirdly，with the help of China's Tianlian relay satellites，the transmission（傳輸）speed was highly increased and the whole live broadcast ran smoothly.These changes showed that Chinese aerospace industry has made great progress in the past nine years.Finally，along with the technological progress，the space lecture discussed more disciplines of science.For example，biology was added.
    Though these space lectures showed various topics，the aim behind them has never changed.Both space lectures aim to spread knowledge about manned spaceflights among young people and encourage them to love science.Zhou Jianping，designer-in-chief of China's manned space program said that the spirit of science in the youth is an important driver of the progress of mankind and these space activities can help them build the spirit of loving science.

根據(jù)短文內(nèi)容回答下列問題，每個答案不超過5個單詞。
（1）How long did the lecture on Tiangong space station on Dec 9，2021 last？

About an hour.

About an hour.

（2）Who has given two space lectures on the space station？

Wang Yaping.

Wang Yaping.

（3）In how many ways was the space lectures in 2021 different from the lecture nine years ago？

4.

4.

（4）What spirit do the two space lectures help young people to build？

The spirit of loving science.

The spirit of loving science.

（5）How do you feel after reading this passage？Please use TWO adjectives（形容詞）to describe your feeling.

Proud and hopeful.

Proud and hopeful.