问题 单项选择题 A1/A2型题

除何者外,下述疾病血沉均增快()。

A.多发性骨髓瘤

B.胃癌

C.活动性结核

D.弥散性血管内凝血

E.晚期妊娠

答案

参考答案:D

解析:血沉能指示某些疾病发展和预后的判断,凡体内有感染或组织坏死,或疾病向不良性进展,血沉一般会加快。妊娠期血沉增快可能与生理性贫血、纤维蛋白原量逐渐增高、胎盘剥离、产伤等有关。恶性肿瘤、多发性骨髓瘤、巨球蛋白血症、活动性结核、浆细胞的恶性增殖致使血浆病理性球蛋白高达40~100g/L或更高,血浆纤维蛋白原增多,致使红细胞zeta电位降低,彼此易于沾边成缗钱状,此种聚集的红细胞团块与血液接触的总面积缩小,受到血浆的阻力减弱而使血沉加快。

阅读理解

I travel a lot, and I find out different “styles”(风格) of directions every time I ask “How can I get to the post office?”

Foreign tourists are often confused(困惑) in Japan because most streets there don’t have names; in Japan, people use landmarks(地标) in their directions instead of street names. For example, the Japanese will say to travelers, “Go straight down to the corner. Turn left at the big hotel and go past a fruit market. The post office is across from the bus stop.”

In the countryside of the American Midwest, there are not usually many landmarks. There are no mountains, so the land is very flat; in many places there are no towns or buildings within miles. Instead of landmarks, people will tell you directions and distances. In Kansas or Iowa, for example, people will say, “Go north two miles. Turn east, and then go another mile.”

People in Los Angeles, California, have no idea of distance on the map; they measure distance in time, not miles. “How far away is the post office?” you ask. “Oh,” they answer, “it’s about five minutes from here.” You say, “Yes, but how many miles away is it?” They don’t know.

It’s true that a person doesn’t know the answer to your question sometimes. What happens in such a situation? A new Yorker might say, “Sorry, I have no idea.” But in Yucatan, Mexico, no one answers “I don’t know.” People in Yucatan believe that “I don’t know” is impolite. They usually give an answer, often a wrong one.        A tourist can get very, very lost in Yucatan!

小题1:When a tourist asks the Japanese the way to a certain place, they usually ______.

A.describe the place carefully

B.show him a map of the place

C.tell him the names of the streets

D.refer to recognizable buildings and places小题2:What is the place where people measure distance in time?

A.New York.

B.Los Angeles.

C.Kansas.

D.Iowa.小题3:People in Yucatan may give a tourist a wrong answer ______.

A.in order to save time

B.Los Angeles.

C.so as to be polite

D.for fun小题4:What can we infer from the text?

A.It’s important for travelers to understand cultural differences.

B.It’s useful for travelers to know how to ask the way properly.

C.People have similar understandings of politeness.

D.New Yorkers are generally friendly to visitors.

单项选择题