Which of the following is the world's smallest continent

单项选择题What is the generation with a sudden, large increase in birthrate called in the United States after World War Ⅱ from 1947 to 1961

单项选择题Ronald Reagan used to be a ______.

单项选择题Which of the following is NOT one of the major branches of linguistics

单项选择题The celebration of Thanksgiving Day has been observed to thank ______.

单项选择题______ can be simply defined as the study of meaning.