2. 下降；减少

3. 由于......的原因

4. 以防；万一

5. 建立，设立；设置；创办

6. 由于

7. 而不是

8. 总之

9. 导致；致使

Ⅲ.重点句式

1.with复合结构

This marked the beginning of the "space race" between the US and the USSR，which ended with the US (put) a man on the moon in 1969.

这标志着在美国和前苏联之间开始了"太空竞赛"，这场竞赛到美国于1969年把人送上月球为止。

2.so that引导目的状语从句

It was launched in 1990 astronomers could observe space without the Earth's atmosphere being a barrier.

它于1990年被送入太空，以便天文学家观测太空时能不受地球大气层的阻碍。

3.in case 引导状语从句

...so as to research life in space and provide a stepping stone future manned flights are sent out.

......为的是研究太空生命并为将来发送载人客机提供落脚地。

4.as long as 引导条件状语从句

... people remain interested，we will keep exploring the world overhead.

......只要人们仍心存兴趣，我们将会继续探索头顶上的世界。

Ⅰ.根据P26课文内容判断正(T)、误(F)

1.The moon is the only frontier left to explore for man.(　　)

2.The invention of Hubble Telescope contributes to exploring space further.(　　)

3.The successful launch of Shenzhou Ⅴ makes a great difference to China's manned space programme.(　　)

4.A permanent base has been set up on the moon.(　　)

5.The space exploration has been about 60 years.(　　)