15远中邻合面窝洞，按Black窝洞分类法，应是:A．Ⅰ类洞 B．Ⅱ类洞 C．Ⅴ类洞

People enjoy taking trips. But what are the reasons they leave home? One reason is for education. People travel because they want to learn more about other people and other places. They are curious about other cultures. When people are tourists, they get a quick look at different ways of living. Even a short look at another kind of lifestyle is an important lesson. On a trip, a person can learn directly by visiting museums and historic spots. What does a tourist learn who sees the art museums, visits the historical palaces and other scenic spots in Paris and shops along the River Seine? He gets a vivid picture, a real life of one of the French people. He learns about their attitudes（态度）, how they feel about business, beauty and history.

What about the tourist who goes to Hong Kong? Does he get the same information that he could get from a book? He might read that Hong Kong is crowded, that there is less than 200 square meters of space for each person. But seeing and feeling the lack of space will impress him much more. He might read that there are nearly 200 vehicles for every kilometer of roadway. But the sight of so many vehicles parked along the roadside would be a much more vivid lesson. The tourist to Hong Kong will never forget the contrasts(对比，对照): the straight vertical lines of tall modern buildings and the moving lines of boats that people live in.

小题1:Why do people leave home to travel according to the passage?

A．For education.

B．For adventure.

C．To enjoy themselves.

D．To look for a different lifestyle.小题2:What do we learn from the passage about Paris?

A．It has a large population.

B．It has many tall buildings.

C．There are 200 vehicles for every kilometer of roadway.

D．There are many museums and palaces.小题3:What impression will a tourist get of Hong Kong?

A．It has many big and beautiful parks.

B．It is very crowded.

C．It has many historical spots.

D．It is an important industrial center.小题4:What does the passage tell us about traveling?

A．It makes our life more interesting.

B．It enables us to get first-hand knowledge.

C．It helps develop our personalities.

D．It brings about changes in our lifestyle.

如用桩冠修复该牙，冠桩的长度和宽度分别为()

A．长度为根长的2/3～3/4，宽度应为直径的1/3

B．长度为根长的1/2，宽度应为直径的1/3

C．长度为根长的1/3，宽度应为直径的2/3～3/4

D．长度为根长的2/3～3/4，宽度应为直径的1/2

E．以上均不是

有关群落演替顶极学说中，单元顶极论和多元顶极论有何异同点

市场营销研究报告的基本评价标准是（）

A.与读者的沟通程度

B.对整个营销研究起画龙点晴的作用

C.完整性.准确性.明确性.简洁性

心血虚多见的脏腑是（）

A.心和脾

B.肝和脾

C.心和肾

D.心和肝

E.脾和肾