十八大提出今后经济体制改革的核心问题是（） A.处理好政府和市场的关系 B.发展多种

阅读下面材料,根据其内容完成后面的5 个小题。

     Dragon-Boat Festival also called the Duanwu Festival,is celebrated on the fifth day of the fifth month according

to the Chinese calendar．For thousands of years,the festival has been marked by eating Zong Zi and racing dragon

boats．To hold the dragon-boat races is in memory of Qu Yuan,one of the greatest poets(诗人)in China．

     Qu Yuan was born in Zigui of Hubei Province over 2200 years ago．Qu Yuan was an honest minister(大臣)of the

State of Chu,during the Warring States Period(475--221 BC)(战国时期)．He was upright,and wise．He wanted to

bring his country peace and make the State more stronger,but the country was in the hands of bad officials,he failed．

At last,he was very discouraged(1)the Miluo River,throwing,he,into,himself,life,by,his,ended．(2)据说当时人们从船

上跳下去试图救他.But it was too late. Also,they were very sad and they threw rice into the water to feed Qu Yuan's

spirit．

     (3)Now we read his poem Li Sao which was filled with deep love for his country.We can see the dragon-boat races

and have a kind of Chinese food named Zong Zi to eat during the Dragon-boat Festival．

1. What are the two important things on the Dragon-Boat Festival?

2.把(1)处画线部分的单词组成句子.                                                        

3.把文中(2)处的汉语句子译成英语.                                                          

4.把(3)处画线部分翻译成汉语.                                                            

5.Write the words that can describe the qualities of Qu Yuan．(at least 3)

该投资项目属于( )。

A．短期投资

B．长期投资

C．直接投资

D．间接投资

下述有关开腹与腹腔镜胆囊切除术的比较，不正确的是（）

A.腹腔镜手术失去了立体视觉变成了平面视觉

B.腹腔镜手术对机体的应激、免疫、代谢影响小

C.腹腔镜手术创伤小、痛苦轻、康复快

D.腹腔镜手术丧失了手指直接触诊和紧急处理能力

E.腹腔镜手术可完全替代开腹手术

以下关于数据流程图(DFD) 的描述中，正确的是

A) 数据流程图可以反映处理的执行顺序
B) 数据流程图中的数据存储反映了数据的存储结构
C) 任何一个系统都可以用一个数据流程图来完整地加以描述
D) 数据流程图表示的对数据的处理逻辑，反映了软件必须完成的功能

简述两种相对密度测定方法的原理和应用范围。