“说甚神仙，看千年古洞开时，城郭人民还是耕田凿井；阅成今古，听半夜金鸡叫醒，兴亡秦汉

某阳离子的结构示意图为

，则x的数值可能是（　　）

A．9

B．10

C．12

D．17

兔瘟常发生于（）以上的兔。

A.1个月

B.2个月

C.3个月

Gift giving is different from culture to culture and person to person.

When giving gifts, sometimes color is important. For example, for many Chinese people around the world, red is a lucky color, and people often like to pack gifts in this color. However, did you know that in Korea ，red is a color of death. That is why you should not pack gifts in this color if you are giving a gift to a Korean person.

What about western countries? In western countries, the color of packing paper is not really important. But color does matter when giving flowers，especially roses．You should not give red roses to a western person you don't know very well because they are a symbol (象征) of love．You could give yellow roses instead as these are a symbol of friendship．You could also send pink roses as gifts to say thank you．

What other things should you remember when giving gifts to someone from a different culture? Well，one thing you should keep in mind is the person’s religion (宗教)．When choosing a gift for a Muslim (回教徒的)or Jewish (犹太族的)friend，you should never get food including pork or things made from pigskin．Another thing that you should not get for a Muslim person is alcohol(酒)．

根据短文内容简要回答下列问题

小题1:In which country do people think red is the color of death?

小题2:How could we show our friendship to the western friends?

小题3: Can we give a Muslim friend a bottle of alcohol as a gift ?

小题4: How many colors are mentioned (提到) in this passage?

小题5:What’s the main idea of this passage?

两栖动物的幼体发育成成体要经过   [ ] 

A．变态发育    

B．不完全变态发育

C．完全变态发育    

D．完全变态和不完全变态发育

数据库的设计通常可以分为这样4个步骤：需求分析、概念设计、 【5】 和物理设计。