综合写作：
A vine (climbing plant) from Asia called kudzu was introduced into the southeastern United States over a century ago as a means of decorating gardens and preventing soil erosion. Kudzu has quickly spread across the southeastern United States and has become an invasive species that kills off native plants and trees by climbing over them and blocking them from sunlight. Three methods of controlling the spread of kudzu have been proposed.
Crown Removal
One way of getting rid of the invasive kudzu is by removing its root crown. The root crown is the part of the kudzu where its stem and roots meet. New kudzu vines grow from the root crown and not from the roots. Therefore, cutting just below the root crown and removing the crown from the where its stem and roots meet. New kudzu vines grow from the root crown and not from the roots. Therefore, cutting just below the root crown and removing the crown from the soil will prevent new kudzu vines from growing and may help eradicate kudzu.
Grazing Goats
Another control technique involves transporting goats to areas overgrown with kudzu and allowing the goats to graze (feed) on the kudzu to remove it. Goats are relatively small but eat a great deal, so a large herd of goats can be driven in trucks to areas of kudzu infestation, where the goats can graze until the kudzu has been cleared. Importantly, grazing by livestock weakens kudzu and prevents it from regrowing. so this control method has the potential to address the problem.
Fungi
A third control method consists of using naturally occurring microorganisms, such as fungi, that feed on kudzu. Some scientists have recently conducted a series of experiments with fungi. When a kudzu plant was infected with fungi in the morning, signs of infection were already visible by the afternoon. Specifically, the plant’s leaves had become weak and lifeless. The use of fungi may thus help eliminate kudzu.
学术写作：
Your professor is teaching a class on business management. 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. Gupta:
This week’s course materials will focus on scientific discoveries. While scientific researchers usually prefer to share what they learn with other scientists, many businesses and governments keep certain scientific discoveries secret. Some people believe that all scientific discoveries should be shared freely among scientists all around the world and that governments and businesses should not keep any discoveries secret. What do you believe and why?
Kelly:
I don’t think all discoveries should be shared. Businesses, for example, often spend a lot of money on scientific research in order to make a discovery that can lead to profit. Even if that discovery benefits everyone, the business has a right to keep the discovery secret so that it can develop a profitable product from the research.
Paul:
Sharing knowledge is crucially important to most scientists. Scientists usually publish the details of their discoveries in scientific journals, which means that everyone can see what the scientists have accomplished. Being recognized as the person who made a discovery is the biggest reward for any scientist. When scientists keep their discoveries secret, they lose that recognition. That is very unsatisfying.
