2021-2022学年度第19-20期总第856期 (6版)
Seeing the big bang (Page 6)

I. Fill in the table.
Comparison between Hubble and Webb
    Hubble    James Webb
Vision    visible light

    infrared vision
(This allows it to 1. _____________.)
Mirror    2.4 meters across

    more than 6.5 meters across but lighter;
segmented
(This allows it to 2. _______________.)
Orbit    530 kilometers above Earth

    1.6 million kilometers away
(This is where the gravitational force of Earth and the Sun balance, 3. __________________.)

II. Language study.
用所给词的正确形式填空，并思考其成分。
1. ____ (launch) from a tropical rainforest in South America, Webb “begins a voyage back to the birth of the universe”.
2. _____ (intend) as a successor to the old Hubble Space Telescope, the Webb Telescope has taken 30 years to design and construct, _____ (cost) $10 billion in total.
3. Webb has infrared vision, ____ (allow) it to see through cosmic clouds of dust.
4. The ultraviolet wavelengths ____ (make) by the first stars and galaxies have stretched as the universe expands.

III. Guess the Chinese meaning of the following expressions.
launch             _________
successor          _________
stretch          _________
bounce off      _________
span              _________
be bound for      _________

参考答案：
I. 1. see through cosmic clouds of dust; 2. fold like a drop-leaf table for launch; 3. requiring minimal fuel for a spacecraft to stay put
II. 1. Launched; 2. Intended, costing; 3. allowing; 4. made
III. 发射；继承者；延展；弹开；横跨；驶向