听力音频：
L1：
1. What is the lecture mainly about
Unusual features of melting glaciers
Effects of ocean currents on glacier melting
An unconventional research method
An environmental problem caused by large ships
2. Why does the professor mention an incident involving a cargo ship in the Pacific Ocean
To point out the main weakness of flotsam science
To explain the origins of flotsam science
To emphasize the ongoing need for flotsam science
To provide an example of how flotsam science benefits industry
3. According to the professor ， what were scientists able to identify in Pacific Ocean currents as a result of flotsam science？
Long-term changes in temperature and salt content
Fluctuations in the growth of algae
The relationship between ocean depth and water movement
How winds affect water speed and direction
4. Why does the professor mention organisms that thrive in the upper portions of the ocean
To contrast glacial melt water with ocean water
To discuss a limitation of a certain type of scientific device
To indicate a new research area to which flotsam science can contribute
To provide an example of how ocean currents affect water temperatures
5. According to the professor ， why has one scientist used toy ducks to study moulins（多选题）
They can withstand cold temperatures and high pressure.
They do not harm the environment.
They can be easily equipped with electronic measuring devices.
They are very inexpensive.
6. Why does the professor say this:（此题缺重听音频）
To indicate the researcher’s thought process
To express surprise at the outcome of an experiment
To admit to not knowing how to answer the researcher’s question D. To question a flawed assumption made by the researcher
