In the expression "an immense body of literature", the word "literature" is nearest in meaning to ______.

单项选择题The phrase 'seeding' the center 'eye' means ______.

单项选择题The two factors concerning hurricanes that scientists most want to learn about are ______.

单项选择题Hurricane Belle was noteworthy because ______.

单项选择题According to Dr. Sheets, the main danger of an error in hurricane prediction is that ______.

单项选择题It can be seen from the passage that the two immediate goals of hurricane research are ______.