单位体积空气具有的( )的机械能所呈现的压力，是风流质点热运动撞压器壁面而呈现的压

   从方框中选出适当的句子补全对话。

A:   小题1:  

B: No, that’s John. Jack is shorter than John.

A: They look the same.     小题2:  

B: Yes, they are. And they are my best friends. We have the same hobbies(爱好).

A: Then, what are your hobbies?

B:    小题3:   

A: Do you have any differences?

B: Yes. 小题4:  

A: Why do you like them?

B: 小题5: 

A．Are they twins?

B．They are more outgoing than me and I am more serious than them.

C．Is that Jack?

D．Because I like to have friends who are like me.E. We all enjoy playing the guitar and we like sports.

朝鲜族的传统菜肴是( )。

A．泡菜

B．白肉血肠

C．手扒羊肉

D．扒大乌参

不管是正式群体还是非正式群体，都有群体凝聚力、______、群体气氛以及群体成员的人际关系。

下列选项不一定是信托的生效要件的是( )。

A．具有合法的信托目的

B．确定、合法的信托财产

C．登记

D．书面形式

各种气瓶在存放和使用时，要距离明火（）以上，并且避免在阳光下暴晒，搬动时不得碰撞。

A.10m

B.8m

C.5m

D.3m