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问题 单项选择题

41～45题基于以下题干：
一农民买了5种化肥，由于仓库地方有限只能将化肥袋子紧贴着排列放置，每个袋子内装一种化肥。化肥会从编织袋中渗出，如果起反应，将降低肥效，所以不能把两种能起反应的化肥装在相邻的袋子中。该农民的化肥种类有N,K,L,M和W，这些化肥仅有的反应关系如下：
N与K反应，N和K不能相邻；
W与K反应，W和K不能相邻；
N与L反应，N和L不能相邻；
L与M反应，L和M不能相邻。

若这5种化肥中，每种该农民都有一种，则下面哪一项按顺序把化肥分配到5个连续袋子中的方案是可以接受的

A．N,L,K,M,W

B．N,M,W,L,K

C．N,W,M,L,K

D．L,K,W,M,N

答案

参考答案：B

解析：首先将各种化肥的关系找出：
(1) N与K和L之间有反应关系，所以N能与W和M相邻，不能跟K和L相邻；
(2) K与W和N有反应关系，所以K可以与L和M相邻，不能跟W和N相邻；
(3) L与N和M有反应关系，所以L可以与W和K相邻，不能跟N和M相邻；
(4) M仅与L有反应关系，所以M可以与N,K和W相邻，不能跟L相邻；
(5) W仅与K有反应关系，所以W可以与N,L和M相邻，不能跟K相邻。
N和L不能相邻，A排除；M和L不能相邻，C排除；K和W不能相邻，D排除。

单项选择题 B型题

十二指肠溃疡疼痛部位多为（）

A.全腹

B.右下腹

C.下腹正中或偏左

D.剑突下正中或偏左

E.上腹正中或偏右
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阅读理解

What is the color of the universe? Astronomers did not answer this question until two months ago. This was when two American astronomers reported on their study of all the light in the universe. They said that the universe would appear to the human eye to be a light greenish color, called turquoise(青绿色). Karl Glazebrook and Ivan Baldry of Johns Hopkins University in Baltimore, Maryland, reported their findings in January. They presented research at a meeting of the American Astronomical Society. They said that finding the color of the universe was not part of their more serious scientific research. They did it for fun.

However, earlier this month, the scientists admitted to making a mistake. They said their finding was much more colorful than it should have been. They now say the light from our universe is closer to white. It is more like a milky or creamy white color.

The scientists gave a number to each of the colors of the different star systems. Then they added the numbers together and found the average measurement. The scientists used this average to identify the color of the universe. They said it was a very pretty light green or turquoise color. They called it “cosmic (宇宙的) spectrum (光谱) green.” Many newspapers and television stations reported their finding.

Other scientists and color engineers attempted to reproduce the result. Mark Fairchild of the Rochester Institute of Technology in New York was the first person to identify a mistake. He discovered a mistake in the computer software program used by the Johns Hopkins scientists.

When the mistake was corrected, the results changed. The new color of the universe is much less colorful. It is very close to white. The scientists apologized for the mistake. They are now working with the Rochester Institute of Technology to produce more images regarding the color of the universe.

48. Why did the scientists do the research?

A. They wanted to win a Nobel Prize.     B. It’s required by the government.

C. They did it just for fun.              D. It’s part of their research.

49. We can infer that the passage was probably written in _______.

A. January     B. February    C. May        D. March

50. According to the passage, which of the following statements is TRUE?

A. None of the researches done by scientists is right.

B. Scientists sometimes may make mistakes in their work.

C. The color of the universe is light greenish.

D. Mark Fairchild apologized for his mistake about the color of universe.
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