下列有关试剂的保存方法，错误的是 A．金属钠保存在煤油中 B．存放FeSO4溶液

9.9898…用简便方法记作______．

The flag, the most common symbol(象征) of a nation in the modern world, is also one of the most ancient. With a clear symbolic meaning, the flag in the traditional form is still used today to mark buildings, ships and other vehicles related to a country.

The national flag as we know it today is in no way a primitive(原始的)artifact. It is, rather, the product of thousands of years' development. Historians believe that it had two major ancestors, of which the earlier served to show wind direction.

Early human beings used very fragile houses and boats. Often strong winds would tear roofs from houses or cause high waves that endangered travelers .People's food supplies were similarly vulnerable. Even after they had learned how to plant grains, they still needed help from nature to ensure good harvests. Therefore they feared and depended on the power of the wind, which could bring warmth from one direction and cold from another.

Using a simple piece of cloth tied to the top of a post to tell the direction of the wind was more dependable than earlier methods, such as watching the rising of smoke from a fire. The connection of the flag with heavenly power was therefore reasonable. Early human societies began to fix long pieces of cloth to the tops of totems(图腾) before carrying them into battle. They believed that the power of the wind would be added to the good wishes of the gods and ancestors represented by the totems themselves.

These flags developed very slowly into modern flags. The first known flag of a nation or a ruler was unmarked: The king of China around 1000 B.C. was known to have a white flag carried ahead of him. This practice might have been learned from Egyptians even further in the past, but it was from China that it spread over trade routes through India, then across Arab lands, and finally to Europe ,where it met up with the other ancestor of the national flag.

小题1:The best title for the passage would be______.

A．Power of the National Flag

B．Uses of Flag

C．Types of Flags

D．Development of the National Flag小题2:The underlined word “vulnerable” in Paragraph 3 means_____

A．impossible to make sure of

B．difficult to find

C．likely to be protected

D．easy to damage小题3: The earliest flags were connected with heavenly power because______

A．they were believed to stand for natural forces

B．they could bring good luck to fighters

C．they were handed down by the ancestors

D．they could tell wind direction小题4:What does the author know of the first national flag?

A．He thinks it came from

B．He believes it was made in Egypt

C．He doubts where it started.

D．He knows when it was sent to Europe小题5: What was the author most probably talk about next?

A．The role of China in the spread of the national flag.

B．The second ancestor of the national flag.

C．The use of modern flags in Europe

D．The importance of modern flags

脂酸氧化过程中不需要的是

A．CoASH

B．NAD⁺

C．NADP⁺

D．FAD

E．肉碱

そのご質問につきましては、今週中に（）かと思います。

A.お答えられる

B.ご答えられる

C.お答えできる

D.ご答えできる

以下叙述中正确的是( )。

A．CPU能直接读取硬盘上的数据

B．CPU能直接存取内存储器

C．CPU由存储器、运算器和控制器组成

D．CPU主要用来存储程序和数据