目前医疗卫生观念正从哪种类型向"自助型"转变（） A.服务型 B.依赖型 C.利用型

Without proper planning, tourism can cause problems. For example, too many tourists can crowd public places that are also enjoyed by the inhabitants(居民) of a country. If tourists create too much traffic, the inhabitants become angry and unhappy. They begin to dislike tourists and to treat them impolitely. They forget how much tourism can help the country’s economy. It is important to think about the people of a destination(目的地) country and how tourism affects them. Tourism should help a country keep the customs and beauty that attract tourists. Tourism should also advance health and happiness of local inhabitants.

　　Too much tourism can be a problem. If tourism grows too quickly, people must leave other jobs to work in the tourism industry. This means that other parts of the country’s economy can suffer.

　　On the other hand, if there is not enough tourism, people can lose jobs. Businesses can also lose money. It costs a great deal of money to build large hotels, airports, first-class roads, and other support facilities(设施) needed by tourist attractions. For example, a major international-class tourist hotel can cost as much as 50 thousand dollars per room to build. If this room is not used most of the time, the owners of the hotel lose money.

　　Building a hotel is just a beginning. There must be many support facilities as well, including roads to get to the hotel, electricity, sewers(阴沟) to handle waste, and water. All of these support facilities cost money. If they are not used because there are not enough tourists, jobs and money are lost.

小题1:Which of the following has most probably been discussed in the paragraph that goes before the passage?

A．It is not important to develop tourism.

B．Building roads and hotels is important.

C．Support facilities are highly necessary.

D．Planning is of great importance to tourism.小题2:Too much tourism can cause all these problems except _____.

A．a bad effect on other industries

B．a change of the customs of the country

C．air and water pollution

D．pressure on traffic小题3:Not enough tourism can lead to _____.

A．the fact that some people may be out of work

B．an increase in tourist attractions

C．the higher cost of support facilities

D．a rise in price and a fall in pay小题4:The word “handle” in the last paragraph most probably means _____.

A．carry away

B．pick up

C．get in

D．take down

下述哪些正确（）

A.二尖瓣中度狭窄时，瓣口面积在1.5cm²以上

B.二尖瓣重度狭窄时，瓣口面积在1.0cm²以下

C.主动脉瓣重度狭窄时，平均跨瓣压差＞50mmHg

D.主动脉瓣重度狭窄时，最大跨瓣压差＜70mmHg

E.二尖瓣狭窄但前叶弹性尚好时，第1心音可亢进

走进中学，一切都是新的。新的班级、新的老师、新的同学。面对新的环境，下列想法不对的是 [ ]

A．我要尽快适应老师和同学

B．我要积极参加校园文化活动

C．都是陌生的人，我只和认识的同学一起学习

D．我要主动伸出友谊的“橄榄枝”，结识新同学

个体发育过程中最早合成和分泌的抗体，且分子量最大的抗体是（）。

A.IgG

B.IgM

C.IgA

D.IgD

E.IgE

水下混凝土灌注时间不得长于首批混凝土( )

A．终凝时间

B．初凝时间

C．拌和时间

D．施工时间