听力音频：
Questions 31-40
Complete the notes below.
Write ONE WORD ONLY for each answer.
Automatic underwater vehicle (AUV)
Description
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It looks like a small 31…….
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It is controlled remotely like a 32…….
What it can measure
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Water temperature
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Water pressure
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The level of 33…….in the sea
Working conditions
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Good water 34…….
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Proper water temperature and depth
Measurements help us know
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The physical and biological aspects of the ocean
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The impacts of 35…….on marine ecosystem
Advantages
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It can handle tasks that cannot be done by humans.
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It can operate without 36…….
Disadvantage
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It may cause a 37…….damage to the environment.
Working process
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It collects data from the 38…….of the ocean floor.
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Its engine uses 39…….from the fuel tanks.
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Scientists send the message by using satellite phones.
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The antenna at the 40…….wingtip transmits the message.
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