单项选择题In the late 1950’s, for the first time a computer programming language _____.
单项选择题Concerning the style of the book, it is revealed in the text that _____.
单项选择题Which of the following statements is NOT true
单项选择题By saying that the book of Grail Bird could easily be a book about the hunt for Bigfoot , the author means that _____.
单项选择题From this article, we may draw the conclusion that _____.