题目

Directions: Read the following passage. Summarize the main idea and the main point(s) of the passage in no more than 60 words. Use your own words as far as possible.Every culture has set rules about how people should act. Patterns of good behavior, or manners, show respect and care for others. Yet the details of how to express respect vary.Greeting people cheerfully is almost always considered polite. But it’s more important in some cultures than others. For example, when you enter a store in France, you should always greet the person working there. Other cultures also value greeting people. 影响扦插成活率的因素很多，都可以通过实验来探究。如材料的选择：可以有枝条长、短的对比，枝条老、嫩的对比，剪口部位和形态的对比，腋芽的饱满与否或有无的对比，极性的顺逆对比等。环境条件可以对比的也很多，你能不能列出几种可以对比的因素？做对照实验时，你认为要注意哪些因素？