Demand curve（or demand schedule） 需求曲线（或需求表

中外学者一致认为，划分货币层次的主要依据是金融资产的()。

A.稳定性

B.流动性

C.兑换性

D.还原性

老年患者，2年前诊断肺心病，1周来咳嗽、咳痰、喘息加重，双下肢水肿，体检：肺内多量湿性啰音，心率100次/分，肝肋下2.5cm，双下肢水肿。白细胞计数及中性粒细胞分类均增高，血气分析：pH7.335，PaO₂50mmHg，PaCO₂78mmHg，HCO₃^-34mmol/L。

根据上述血气分析结果，患者应属于下列哪种酸碱平衡失调（）。

A.呼吸性酸中毒合并代谢性碱中毒

B.代谢性酸中毒合并呼吸性碱中毒

C.呼性酸中毒代偿

D.呼性酸中毒失代偿

E.代谢性碱中毒

肺脓肿的典型X表现为()
支气管扩张的特征性X表现为()

A．右下肺实变阴影

B．右下肺炎性阴影伴空洞有液平

C．右下肺透亮度增高

D．两肺多发性结节阴影

E．双下肺环状、卷发状阴影

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.

出现上述情况下列处理方法错误的是

A．硝普钠静脉滴注

B．吸氧

C．保持呼吸道通畅

D．给予镇静剂

E．保持头低脚高位