X线表现为左下颌骨骨质破坏呈虫蚀状，下颌神经管影像模糊不清，左下颌第二磨牙牙周骨质破

The doctor recommend he _________ a few more days in hospital.

A．stays.

B．to stay

C．stay

D．would stay

由于怕饭菜太烫，来不及冷却而影响小明的早餐，妈妈总是很早就起床了。为了让妈妈多睡一会儿，小明就想找到一种让物体快速冷却的方法。为此小明进行了如下的探究：

小明注意到妈妈是把饭菜放在空气中冷却的，而厨房中适合用来冷却的另一种物质就是水。水和空气哪个的导热性能好呢？为此小明用两个相同的牛奶瓶，都装入热牛奶，一个放在温度与室温相同的水中，另一个就放在空气中，为了尽量减少其他因素的影响，他把两个瓶都用木块垫起来。如图所示。实验时他每隔一定的时间记录一次甲、乙两温度计的示数，得到的数据如下表： 

(1)实验中，小明需要控制它们的一些量保持相同，如_________；（举出一例即可）

(2)小明通过实验，得到的正确结论是什么？_________；

(3)小明分析了冷却速度变慢的原因，认识到这是因为牛奶冷却的快慢还会受到_________的影响；

(4)根据(3)中的分析，小明终于找到了一个用水使物体快速冷却的办法，并且举一反三，明白了工业生产中使用流水喷淋法冷却高温物体的好处：_________。

   

药品作为特殊商品，其特殊性之一是具有两重性，而两重性主要体现在（）。

A.药品质量

B.用药后果

C.诊断、治疗

D.功能主治

E.针对性

（）是通常与其调控的基因具有一段距离的DNA顺式作用元件。

A．启动子

B．终止子

C．增强子

D．调节子

E．阻抑物

At one time, people used to travel to foreign countries because they thought they would be different from home—the building, the food, the national dress. Nowadays, however, one large city is very like another. They all have their Hilton or Sheraton Hotels which look Hilton or Sheraton Hotels everywhere. They all have their McDonald’s, their KFCs, their Pizza Huts. Office buildings look the same everywhere, and most city centers are full of office buildings. And, of course, people are driving the same brands of Japanese or European cars, usually wearing the same kinds of clothing and the world’s airlines are all flying the same aircraft, Boeings or Airbuses.

What, therefore, is the purpose of foreign travel for people who are not on business? What do tourists hope to experience in a foreign country that they cannot experience at home? Why travel to foreign countries at all? The answer could be that people are very interested in the past. It is a nation’s history that is its main attraction. Most of today’s tourists travel overseas to find out what foreign countries and cultures used to be like, not what they are like today. The words “cultural tourism” are now part of the language of tourism, and it is the museums and works of art in many countries that are their main attractions.

If they are lucky—and have had sensible, strong governments—many countries also usually have at least a few beautiful places for tourists to visit.

Finally there is perhaps a nation’s greatest attraction: its people. A nation is not just its historical buildings, its works of art or beautiful places, it is also the people who live in it. This is why a country such as Thailand attracts millions of people every year. They come mainly because of the friendliness of the Thai people. It is why the Pacific Islands are also so popular. There may not be much to see or do in Fiji, but there are lots of friendly, smiling people to make visitors feel welcome.

小题1:The passage is mainly about      .

A．the importance of tourism

B．different foreign cultures

C．how to plan an overseas trip

D．why people travel to foreign countries小题2:The writer thinks that large cities in foreign countries       .

A．are similar to one another

B．share the same aircraft

C．do not have good hotels

D．do not offer a warm service to foreigners小题3:The writer believes that many tourists are interested in foreign        .

A．hotels

B．history

C．cars

D．programs小题4:The underlined phrase “cultural tourism” means        .

A．visiting lots of museums

B．traveling overseas

C．studying the history of a foreign country

D．tourists being interested in a nation’s past and ideas