综合写作：
Not long ago, a species of seabird called Cassin’s auklets died in unprecedented numbers on the western shores of the United States. Scientists do not know exactly what caused their death, but there are several factors that may have contributed to the die – off.
Increased Competition
First of all, it is known that the number of auklets born the summer before the die – off was significantly higher than average. With such a large population, it is possible that the young auklets were simply competing with each other for a limited amount of food. With increased competition for resources, it could be that food was spread thin across the population. Many birds were unable to find enough food and died off before the proper balance between the number of auklets and food resources was restored.
Virus
Another possibility is that the birds were affected by a virus. A few years ago in the same area, populations of sea animals known as sea stars were devastated by a virus that caused large numbers of them to become infected and die. The particular virus found to have caused those deaths is known to be excellent at adapting to different hosts. It is possible, therefore, that the auklets contracted the virus after coming into contact with or eating one or more infected species.
Zooplankton
Finally, scientists have recently discovered a large patch of unusually warm water, hundreds of miles across. This patch formed close to the time the die – off started. The change in water temperature likely had an effect on the populations of tiny sea creatures called zooplankton that auklets feed on. One study found that the zooplankton in that area of warmer water had become smaller and less nutritious than usual. This lack of nutrition may have contributed to the die – off.
学术写作：
Instructions
Your professor is teaching a class on public policy. Write a post responding to the professor’s question.
In your response you should do the following:
- Express and support your opinion.
- Make a contribution to the discussion in your own words.
An effective response will contain at least 100 words.
Dr. Diaz
Many areas are trying to reduce fossil fuel consumption because such fuels cause pollution and may contribute to climate change. To this end, some local governments want to find ways to encourage more people to use electric vehicles. In preparation for a class discussion on this issue, please post a response indicating what initiative you would recommend that governments take to encourage more use of electric vehicles.
Kelly
I live in an apartment building and would have difficulty charging an electric vehicle at home. I think that governments should offer financial support to encourage places such as shopping districts to install a large number of charging stations, maybe even free ones, that the public could use.
Paul
People in my city often deal with long commutes in heavy traffic. But if my local government could set aside lanes on the high – traffic roadways that only electric cars could use, that might encourage people to purchase such a vehicle because they would have shorter and easier commutes.
