L2
讲座
1. What is the lecture mainly about?
A study of the life cycle of nest-building birds
A way to detect which mammals have been in an area
The impact of human activities on certain wildlife habitats
Government policies on wildlife management
2. Why does the professor mention a bear?
To indicate a species the researchers expected to identify
To explain the variety of habitats where nests were collected
To illustrate how animal hairs might end up in birds’ nests
To demonstrate why it is easier to collect nests than set traps
3. The professor explains the method the researchers in Hungary used in their study. What problems does she say the researchers were aiming to avoid?（多选题）
Disturbing the mammals whose fur they were collecting
Making nests unsuitable for future use by birds
Leaving human footprints in forested areas
Interfering with birds’ raising of their young
4. What two unexpected results of the study does the professor mention?（多选题）
Birds’ nests were more commonly found in mountains than in plains.
Hairs from deer and wild sheep were found in many nests.
Some nests contained hairs from animals not normally found in the area.
Only a few nests in a developed area contained hairs from domestic animals.
5. What does the professor imply about the nest collection method?
It does not provide all the information that traditional methods do.
It is less expensive than other hair-collection methods.
It is potentially too invasive to be useful to researchers.
It is most accurate when used in areas isolated from humans.
6. Why does the professor say this:
To express doubt about the effectiveness of the lab procedures
To emphasize the importance of sanitizing the nests
To find out what the students know about contamination
To indicate a topic for which future research is needed
