问题
判断题
相对分子质量＜2500的物质，容易通过血管合体膜。
答案
参考答案：错
搜题请搜索小程序“爱下问搜题”
相对分子质量＜2500的物质，容易通过血管合体膜。
参考答案：错
| 任务型阅读。 请认真阅读下列短文，并根据所读内容在文后表格中的空格里填入最恰当的词。 注意：每空只填1个单词。 | ||||
| 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 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. Business can also lose money. It costs a great deal of money to build large hotels, airports, first-class roads, and other support facilities 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 the room is not used most of the time, the owners of the hotel lose money. | ||||
1 : Tourism
|