[单选题] 处理机或工作站可以进行积分等处理的谱图信号是（ ）。
A.连续的模拟信号；
B.间断的模拟信号；
C.连续的数字信号；
D.间断的数字信号；

In England, football and soccer are the same thing, whereas in America they are different. The basic difference is that in America the game of football allows all players to use their hands to hold the ball while the game is on, but in England (except for the "goalkeeper") the game of football only allows the use of feet, head, and other parts of the body, although the hands may be used in certain circumstances. Such circumstances are when you have a "throw-in", when the ball is "out of play", and when you are placing the ball in a certain position, to take a "free kick", or "a penalty". Of course, there is one player in each team, in the English game of football, who is allowed to use his hands at any time — that is, the "goalkeeper". The English game of football is called "soccer" by the Americans. The American game of football is rather like the English game of rugby, where all the players are allowed

Section Ⅱ Reading Comprehension Part A Directions: Read the following four texts. Answer the questions below each text by choosing [A], [B], [C] or [D]. Mark your answers on ANSWER SHEET 1. Text 1 "All too often.., in the history of the United States, the school teacher has been in no position to serve as a model to the intellectual life," Hofstadter wrote. "Too often he has not only no claims to an intellectual life of his own, but not even an adequate workmanlike competence in the skills he is supposed to impart." Harsh words, perhaps, but Hofstadter’s idea makes sense: If teachers--on the front line of education--don’t have an active intellectual life, they’re not likely to communicate a love of learning and critical thinking to their students. In his 1995 book, Out of Our Minds: Anti-Intellectualism and Talent Development in American Schools, Craig Howley cites several studies about the education and h
A. the brightest students will choose to work as teachers.
B. teachers will read academic books in their spare time.
C. teachers play key roles in building intellectual culture.
D. the social status of American teachers is quite high nowadays.