下列各项中，能影响企业净利润的有 ( )A．投资收益 B．营业成本 C．营业税金

二氧化碳灭火剂用量计算，根据灭火场所的不同可以有哪几种计算方法。

A、体积计算法

B、面积计算法

C、体积计算法和面积计算法

D、周长计算法

下列哪项不是献血法立法目的（）

A.保护职业献血者的权益

B.保证献血者的健康

C.保证用血者的健康

D.保证医疗、临床用血需要

E.以上都不是

一个大于0的数除以分数，所得的结果一定大于被除数．______．

阅读理解

     Without proper planning, tourism can cause problems. For example, too many tourists can crowd

public places that are also enjoyed by the inhabitants of a country. If tourists create too much traffic,

the inhabitants become annoyed 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 country and how tourism affects them. Tourism should help a country, keep the customs

and beauty that attract tourists. Tourism should also advance the wealth 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, air terminals, first- class roads, and

other support facilities(配套设施)needed by tourist attractions. For example, a major international class

tourism 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 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.

1. Which of the following do you think has been discussed in the part before this selection?

A. It is extremely important to develop tourism.

B. Building roads and hotels is essential.

C. Support facilities are highly necessary.   

D. Planning is of great importance to tourism.

2. Too much tourism can cause all these problems EXCEPT ____________ .

A. a bad effect on other industries      

B. a change of tourists' customs

C. over-crowdedness of places of interest

D. pressure on traffic

3. It can be inferred from the text that _____________ .

A. the author doesn't like tourism developing so fast

B. local people will benefit from tourist attraction

C. other parts of a country's economy won't benefit from tourism much

D. we can't build too many support facilities

4. The author thinks it is good for local people to know that tourism will ____________ .

A. waste a lot of money                  

B. weaken their economy

C. help establish their customs            

D. help improve their life

跌倒