| 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 and how tourism affects them. Tourism should help a country to keep the customs and beauty that attract tourists. Tourism should also advance the well-being 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 needed by tourist attractions. For example, a major international-class tourism hotel can cost as much as 50000 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. |
| There are many medical problems in the
modern society. One of the most alarming medical problems in the world is a
{{U}} (21) {{/U}} disease named HIV virus. This kind of virus is first
{{U}} (22) {{/U}} twenty years ago. It weakens the body and develops
fully blown AIDS. AIDS is not obvious in the early stage. Sometimes symptoms
occur within a few weeks after {{U}} (23) {{/U}}. They are often
flu-like, such as {{U}} (24) {{/U}}, fever, headache, diarrhea and night
sweats. The three main {{U}} (25) {{/U}} routes of HIV are sexual contact, exposure to infected body fluids or tissues and from mother to {{U}} (26) {{/U}} or child during perinatal period. This kind of virus can always {{U}} (27) {{/U}} so A. influence B. affect C. effect D. infect [单项选择]超媒体技术是兰种典型的
A. 信息管理技术 B. 数据库管理技术 C. 数据管理技术 D. 收集、存储和浏览离散信息以及建立和表现信息之间关系的技术 [单选题]我国目前试行的高频电磁场卫生学参考标准电场为()V/m。
A.20 B.10 C.30 [判断题]装置最小检测周期的合格判据为装置应能按照所设定的最小检测周期工作，不超过2小时：( )
A.正确 B.错误 [单选题][T]A-B-001 4 2 3
油在油断器中的作用是什么？（ ） A.绝缘、灭弧 B.隔离、灭弧 C.分隔、灭弧 D.间隔、灭弧 [单项选择]百科全书编纂者的始祖是（）
A. 泰勒 B. 汤普森 C. 狄德罗 D. 吉尔布雷斯夫妇 [填空题]人字抱杆的根部应保持在（）上，并用钢丝绳连接牢固。
[单选题]列车运行过程中，接到列车调度员前行列车发生异音、异响、被击打等异常情况，需要在该被击打地点注意列车运行状态的通知后，司机应（ ），待列车通过该被击打地点后及时上报有关运行情况。
A.精力集中、精心操纵 B.确认信号、手比眼看 C.加强瞭望、注意运行 [多选题]备课的内容主要有（ ）
A.备课程标准 B.备教材 C.备学生 D.备教法 E.备学法 [单选题].1945年,日本代表在投降书上签字,日军128万人向中国投降。至此,中国抗日战争胜利结束,世界反法西斯战争也于同日胜利结束。这一天是:( )
A. 9月2日 B. 9月3日 C. 8月15日 D. 8月16日 我来回答: 提交
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