[单项选择]The difference between male and female roles within the house has become ______.


A. blurred
B. crumbled
C. slid
D. slumped

[简答题]What is the difference between linguistic competence and linguistic performance

[单项选择]A great difference between American social customs and those of other countries is the way in which names are used. Americans have little concern for "rank", especially socially. Most Americans do not want to be treated in any especially respectful way because of their age or social rank; it makes them feel uncomfortable. Many Americans even find the terms "Mr.", "Mrs." or "Miss" too formal. People of all ages may prefer to be called by their first names. "Don’t call me Mrs. Smith. Just call me Sally." Using only first names usually indicates friendliness and acceptance. However, if you do not feel comfortable using only first names, it is quite acceptable to be more formal. Just smile and say that after a while you will use first names but you are accustomed to being more formal when you first meet someone.
Very often, introductions are made using both first and last names: "Mary Smith, this is John Jones." In this situation you are free to decide whether to call the lady "Mary"

[单项选择]What is the main difference between an electronic book and a LCD screen


A. The power they need.
B. The portability they come to.
C. The convenience they make.
D. The content they stor

[单项选择]Which is NOT the difference between upright model freezer and chest model freezer

[单项选择]

There is a difference between science and technology. Science is a method of answering (1) questions; technology is a method of solving practical problems. Science has to do with discovering the facts and relationships between (2) phenomena in nature and with establishing theories that (3) to organize these facts and relationships; technology has to do with tools, techniques, and (3) for applying the findings of science. Another (5) between science and technology has to do with the progress in each.
Progress in science (6) the human factor. Scientists, who seek to understand the universe and know the truth within the highest degree of (7) and certainty, cannot (8) their own or other people’s likes or dislikes or to popular ideas about the fitness of things. What scientists discover may shock or (9) people-as did Darwin’s theory of evolution. But even an unpleasant truth is (10
A. better
B. other
C. less
D. more