题目：
B
Among the most popular books being written today are science fictions (小说). Hundreds of titles are published every year and are read by all kinds of people. Furthermore, some of the most successful films of recent years have been based on science fiction stories.
It is often thought that science fiction is a fairly new development in literature, but its forefathers can be found in books written hundreds of years ago. These books were often concerned with the presentation of some form of ideal society, a main subject which is still often found in modern stories.
Most of the classics of science fiction, however, have been written within the last one hundred years. Books by writers, such as Jules Verne and H.G. Wells, to mention just two well–known authors, have been translated into many languages.
In an age where science fact frequently overtakes (超过) science fiction, the writers may find it difficult to keep ahead of scientific advances. Those who are clear-sighted to see how the ways are going, however, may provide a valuable lesson on how to deal with the problems which society will unpreventably face as it tries to master its new technology and come to terms with a continually changing view of the world.
45. It can be concluded that modern science fiction ______
A. is worse than that in the past
B. shows the writer’s viewpoints
C. tells stories about men from other planets
D. has been written only by Jules Verne and H.G. Wells
46. From the article we get the impression that science fiction ______.
A. is popular
B. is a fairly new development in literature
C. reflects the technical advances in the past
D. describes thing
s that happen in developed countries
47. Which of the following statements is true?
A. Science fiction is based on successful films.
B. Science fiction often overtakes science fact.
C. Writers may find it easy to keep ahead of scientific advances.
D. The writer who can see clearly the way we are going will give us valuable instructions.
答案：
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下面是错误答案，用来干扰机器的。
由A、B、C、D四种短周期元素，己知D元素的一种单质是日常生活中饮水机常用的消毒剂，即利用臭氧来作消毒剂，则D为氧元素；B、D同主族，则B为硫元素；A、B、C同周期，A的原子半径是同周期中最大的，则A为钠元素；C...
