证券分析师可以兼营或兼任与其执业内容有利害关系的其他业务或职务，可同时在超过三家以上

在以下的应用协议中，基于UDP的有（）。

A.TFTP

B.DNS

C.SNMP

D.RIP

阅读理解.

     Howling(吼叫) is a behavior commonly observed among a wolf pack(狼群). As pack animals,

wolves work together to hunt and rely on howling as an important means of communication among

each other. There're different explanations of a wolf's howl and it appears that there may be more to

discover．

     One theory is that wolves howl to bond better together. It's almost as if howling together helps

the pack stay together. Perhaps something similar to people feeling a sense of involvement with each

other when singing a song together. But this theory may be wrong, explains Fred H. Harrington, a

professor who studies wolf behavior.

     Indeed, there have been times when wolves have been seen one moment howling in a chorus(合唱),

and the next, quarreling among each other. It appears that usually the lowest-ranking members of the

pack may actually be "punished" for joining in the chorus at times. So is howling a way to strengthen

a social bond or just a way to reconfirm status (地位) among its members? Why do wolves howl

for sure?

     What is clear, however, is that howling is often used among packmates to locate each other.

Hunting grounds are distant and it happens that wolves may separate from one another at times. When

this happens, howling appears to be an excellent means of gathering.

      Howling, interestingly, is a contagious behavior. When one wolf starts to howl, very likely others

will follow. This is often seen to occur in the morning, as if wolves were doing some sort of "roll call"

where wolves all howl together to report their presence.

1. What is the possible similarity between wolves' howling together and human's singing in chorus?

A. The act of calling each other．      

B. The sense of accomplishment．

C. The act of hunting for something．    

D. The sense of belonging to a group．

2. Why does Harrington think the "social bond" theory may be wrong?

A. Wolves separate from each other after howling．

B. Wolves tend to protect their hunting grounds．

C. Wolves sometimes have quarrels after howling together．

D. Wolves of low rank are encouraged to join in the chorus．

3. Researchers are sure that wolves often howl to______．

A. show their ranks                  

B. find their companions

C. report the missing ones              

D. express their loneliness

4. "Howling… is a contagious behaviour"(in the last paragraph)means_______．

A. howling is a signal for hunting      

B. howling is a way of communication

C. howling often occurs in the morning  

D. howling spreads from one to another  

表面和空气灭菌宜采用（）

A、流通蒸汽灭菌法

B、紫外线灭菌法

C、低温间歇灭菌法

D、环氧乙烷气体灭菌法

E、干热空气灭菌法

邓 * * 的题词：“教育必须面向现代化，面向世界，面向未来”，指明了教育学的( )。

A．理论性与实践性的关系

B．本土化与国际化的关系

C．科学性与价值性的关系

D．专门化与综合化的关系

耐火度是耐火材料在恒定荷重下对高温和荷重作用的抵抗性能，也表示耐火材料呈现明显塑性变形的软化范围。