目视飞行直升机使用同一起飞着陆区起飞、着陆时，最低间隔标准应当符合如下规定：先起飞、

肠鸣音亢进的特点是 ( )

A．金属声
B．摩擦声
C．捻发声
D．咕噜音
E．乐鸣音

关于“人不能两次踏进同一条河流”和“人一次也不能踏进同一河流”的说法( )。

A．都是辩证法观点

B．都是形而上学观点

C．前者是辩证法观点，后者是诡辩论观点

D．前者是诡辩论观点，后者是辩证法观点

阅读理解。

     What is the relationship between violence and sports? Psychologists say that there are many

reasons for violence at sports events．One is alcohol．Many fans drink a lot at games．When

people drink, they are more likely to do abnormal things．Psychologist Dennis Brock says,

"Quiet people become loud．Normally nonviolent people become destructive． "

     David Sampson, a sports sociologist, says, "These are often celebratory riots- a large number

of very happy people mixed in with large amounts of alcohol．They don't often seem dangerous

in the beginning, but things get violent quickly． "

     Another reason for violence at sports events is the crowd．When individuals are in a large

group of people, they can lose their sense of personal responsibility．Edward Hirt, a social

Psychologist, says that research shows that people do things in crowds that they would never

do alone．People in crowds feel anonymous - no one knows who they are．Crowds also

make people feel powerful．They stop making personal decisions．They just follow the crowd．

Social psychologists call this a "mob mentality".

Dave Zarifis, head of public safety says, "Some people don't even come to celebrate．They want

to drink hard and make trouble．Someone does something stupid, and it grows from there．You

get a mob mentality．People think it's OK to do almost anything．They think, 'There are so many

of us and not enough of them． '

Social psychologist Dr．Sharon Kennedy says that there are some things officials can do to prevent

violence．Making sure that an area is not overcrowded is very important．Officials should also think

of games as "big parties．" Then they will prepare differently．Kennedy says that in Great Britain they

are controlling the problem with cameras in all the stadiums．"When you know someone is watching,

you are much less likely to behave badly． "

1. Which of the following best gives the main idea of the first two paragraphs?  

A. There's a connection between violence and sports

B. One cause of violence at sports events is alcohol．

C. There are many reasons for violence at sports events．

D. David Sampson and Dennis Brock have the same opinion.

2. Which of the following does NOT belong to a "mob mentality"?

A. "I must drink some alcohol to stop myself feeling shy． "

B. " It's safe to do what many people are doing． "

C. "There are so many of us and not enough of them． "

D. " No one knows I'm doing this． "

3. The last paragraph is mainly about ______．

A. how to turn games into big parties

B. why to install cameras in stadiums

C. how to prevent violence at sports events

D. how to avoid oneself behaving badly

4. What lesson can we learn from this passage?

A. Never drink any alcohol no matter where you are．

B. Whenever you are watching a game, you should keep quiet．

C. Never follow blindly no matter how many people are doing something．

D. Be careful when you are at a stadium because there are cameras there．

小脑病变的症状体征是：（）

A.言语含糊、缓慢或呈爆发式

B.肢体运动性或意向性震颤

C.阔基底步态，走路左右摇晃

D.醉汉步态

E.Romberg征睁眼闭眼均不稳

微囊的制备方法不包括()。

A．薄膜分散法

B．改变温度法

C．凝聚法

D．液中干燥法

E．界面缩聚法